Per Ola Kristensson | Publications

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  1. Gu, A., Zhang, Y., Sun, W., Bian, Y., Zhou, D. and Kristensson, P.O. 2016. Dexmo: an inexpensive and lightweight mechanical exoskeleton for motion capture and force feedback in VR. In Proceedings of the 34th ACM Conference on Human Factors in Computing Systems (CHI 2016). ACM Press: in press. (pdf) (publisher)
  2. Kristensson, P.O. and Lam, C.L. 2015. Aiding programmers using lightweight integrated code visualization. In Proceedings of the 6th Workshop on Evaluation and Usability of Programming Languages and Tools (PLATEAU 2015). ACM Press: 17-24. (pdf) (publisher)
  3. Jacques, J.T. and Kristensson, P.O. 2015. Understanding the effects of code presentation. In Proceedings of the 6th Workshop on Evaluation and Usability of Programming Languages and Tools (PLATEAU 2015). ACM Press: forthcoming. (pdf)
  4. Kristensson, P.O. 2015. Next-generation text entry. IEEE Computer 48(7): 84-87. Invited. (pdf) (publisher)
  5. Jacques, J.T., Perry, M. and Kristensson, P.O. 2015. Differentiation of online text-based advertising and the effect on users' click behavior. Computers in Human Behavior 50: 535-543. (pdf) (publisher)
  6. Reyal, S., Zhai, S. and Kristensson, P.O. 2015. Performance and user experience of touchscreen and gesture keyboards in a lab setting and in the wild. In Proceedings of the 33rd ACM Conference on Human Factors in Computing Systems (CHI 2015). ACM Press: 679-688. (pdf) (publisher)
  7. Vertanen, K., Memmi, H., Emge, J., Reyal, S. and Kristensson, P.O. 2015. VelociTap: investigating fast mobile text entry using sentence-based decoding of touchscreen keyboard input. In Proceedings of the 33rd ACM Conference on Human Factors in Computing Systems (CHI 2015). Best Paper Award. ACM Press: 659-668. (pdf) (publisher) (youtube)
  8. Kristensson, P.O., Bi, X., Howes, A., Oulasvirta, A., Murray-Smith, R., Thimbleby, H., Williamson, J. and Zhai, S. 2015. Principles, techniques and perspectives on optimization and HCI. In Extended Abstracts of the 33rd ACM Conference on Human Factors in Computing Systems (CHI 2015). (Workshops). ACM Press: forthcoming. (pdf) (publisher) (website)
  9. Clawson, J., Arif, A., Brewster, S., Dunlop, M., Kristensson, P.O. and Oulasvirta, A. 2015. Text entry on the edge. In Extended Abstracts of the 33rd ACM Conference on Human Factors in Computing Systems (CHI 2015). (Workshops). ACM Press: forthcoming. (pdf) (publisher) (website)
  10. Grijincu, D., Nacenta, M. and Kristensson, P.O. 2014. User-defined interface gestures: dataset and analysis. In Proceedings of the 9th ACM International Conference on Interactive Tabletops and Surfaces (ITS 2014). ACM Press: 25-34. (pdf) (publisher) (dataset)
  11. Trinh, H., Waller, A., Vertanen, K., Kristensson, P.O. and Hanson, V. Phoneme-based predictive text entry interface. In Proceedings of the 16th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2014). (Text Entry Challenge). ACM Press: 351-352. (pdf) (publisher)
  12. Kristensson, P.O. 2014. From wax tablets to touchscreens: an introduction to text entry research. ACM XRDS 21(1): 28-33. Invited. Special Issue on Computers and Language. Feature. (pdf) (publisher)
  13. Kristensson, P.O. and Vertanen, K. 2014. The inviscid text entry rate and its application as a grand goal for mobile text entry. In Proceedings of the 16th ACM International Conference on Human-Computer Interaction with Mobile Devices and Services (MobileHCI 2014). ACM Press: 335-338. (pdf) (publisher)
  14. Rough, D., Vertanen, K. and Kristensson, P.O. 2014. An evaluation of Dasher with a high-performing language model as a gaze communication method. In Proceedings of the 12th ACM International Working Conference on Advanced Visual Interfaces (AVI 2014). ACM Press: 169-176. (pdf) (publisher)
  15. Garrido, J.E., Penichet, V.M.R., Lozano, M.-D., Quigley, A. and Kristensson, P.O. 2014. AwToolkit: attention-aware user interface widgets. In Proceedings of the 12th ACM International Working Conference on Advanced Visual Interfaces (AVI 2014). ACM Press: 9-16. Best Paper Award. (pdf) (publisher)
  16. Dostal, J., Hinrichs, U., Kristensson, P.O. and Quigley, A. 2014. SpiderEyes: designing attention- and proximity-aware collaborative interfaces for wall-sized displays. In Proceedings of the 19th ACM International Conference on Intelligent User Interfaces (IUI 2014). ACM Press: 143-152. (pdf) (publisher) (youtube) (website)
  17. Nicosia, M., Oulasvirta, A. and Kristensson, P.O. 2014. Modeling the perception of user performance. In Proceedings of the 32nd ACM Conference on Human Factors in Computing Systems (CHI 2014). ACM Press: 1747-1756. (pdf) (publisher) (youtube)
  18. Weir, D., Pohl, H., Rogers, S., Vertanen, K. and Kristensson, P.O. 2014. Uncertain text entry on mobile devices. In Proceedings of the 32nd ACM Conference on Human Factors in Computing Systems (CHI 2014). ACM Press: 2307-2316. (pdf) (publisher) (youtube)
  19. Aylett, M., Kristensson, P.O., Whittaker, S. and Vazquez-Alvarez, Y. 2014. None of a CHInd: relationship counselling for HCI and speech technology. In Extended Abstracts of the 32nd ACM Conference on Human Factors in Computing Systems (CHI 2014). (alt.chi). ACM Press: 749-760. People's Choice Best Talk Award (talk delivered by Matthew Aylett) (pdf) (publisher) (youtube)
  20. Vertanen, K., Emge, J., Memmi, H. and Kristensson, P.O. 2014. Text Blaster: a multi-player touchscreen typing game. In Extended Abstracts of the 32nd ACM Conference on Human Factors in Computing Systems (CHI 2014). (Interactivity). ACM Press: 379-382. (pdf) (publisher) (youtube)
  21. Clawson, J., Brewster, S., Dunlop, M., Kristensson, P.O., Isokoski, P., Oulasvirta, A., Vertanen, K. and Waller, A. 2014. The usability of text entry systems now and in the future. In Extended Abstracts of the 32nd ACM Conference on Human Factors in Computing Systems (CHI 2014). (Special Interest Group Meeting). ACM Press: 1139-1142. (pdf) (publisher)
  22. Vertanen, K. and Kristensson, P.O. 2014. Complementing text entry evaluations with a composition task. ACM Transactions on Computer-Human Interaction 21(2): Article No. 8. (pdf) (publisher)
  23. Dostal, J., Kristensson, P.O. and Quigley, A. 2014. Estimating and using absolute and relative viewing distance in interactive systems. Pervasive and Mobile Computing 10(Part B): 173-186. (pdf) (publisher)
  24. Hoggan, E., Nacenta, M.A., Kristensson, P.O., Williamson, J.H., Oulasvirta, A. and Lehtiö, A. 2013. Multi-touch pinch gestures: performance and ergonomics. In Proceedings of the 8th ACM International Conference on Interactive Tabletops and Surfaces (ITS 2013). ACM Press: 219-222. (pdf) (publisher)
  25. Vertanen, K., Memmi, H. and Kristensson, P.O. 2013. The feasibility of eyes-free touchscreen keyboard typing. In Proceedings of the 15th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2013). (Poster). ACM Press: Article No. 69. (pdf) (publisher) (youtube)
  26. Jacques, J.T. and Kristensson, P.O. 2013. Crowdsourcing a HIT: measuring workers' pre-task interactions on microtask markets. In Proceedings of the 1st AAAI Conference on Human Computation and Crowdsourcing (HCOMP 2013). AAAI Press: 86-93. (pdf) (publisher) (website)
  27. Brock, M. and Kristensson, P.O. 2013. Supporting blind navigation using depth sensing and sonification. In Adjunct Proceedings of the 2013 ACM International Joint Conference on Pervasive and Ubiquitous Computing (Ubicomp 2013). (Poster). ACM Press: 255-258. (pdf) (publisher) (supplemental video)
  28. Dostal, J., Kristensson, P.O. and Quigley, A. 2013. Multi-view proxemics: distance and position sensitive interaction. In Proceedings of the 2nd ACM International Symposium on Pervasive Displays (PerDis 2013). ACM Press: 1-6. (pdf) (publisher) (video)
  29. Dostal, J., Kristensson, P.O. and Quigley, A. 2013. Subtle gaze-dependent techniques for visualising display changes in multi-display environments. In Proceedings of the 18th ACM International Conference on Intelligent User Interfaces (IUI 2013). ACM Press: 137-147. (pdf) (publisher) (youtube) (website) (MIT Technology Review) (The Huffington Post)
  30. Nacenta, M.A., Kamber, Y., Qiang, Y. and Kristensson, P.O. 2013. Memorability of pre-designed and user-defined gesture sets. In Proceedings of the 31st ACM Conference on Human Factors in Computing Systems (CHI 2013). ACM Press: 1099-1108. (pdf) (publisher) (youtube) (supplemental video) (website) (MIT Technology Review) (Co.Design)
  31. Oulasvirta, A., Reichel, A., Li, W., Zhang, Y., Bachnynskyi, M., Vertanen, K. and Kristensson, P.O. 2013. Improving two-thumb text entry on touchscreen devices. In Proceedings of the 31st ACM Conference on Human Factors in Computing Systems (CHI 2013). ACM Press: 2765-2774. (pdf) (publisher) (youtube) (website) (TechCrunch) (BBC) (The Guardian) (MIT Technology Review) (Fast Company) (Wired) (Boing Boing)
  32. Hoggan, E., Williamson, J., Oulasvirta, A., Nacenta, M., Kristensson, P.O. and Lehtiö, A. 2013. Multi-touch rotation gestures: performance and ergonomics. In Proceedings of the 31st ACM Conference on Human Factors in Computing Systems (CHI 2013). ACM Press: 3047-3050. (pdf) (publisher) (youtube)
  33. Dostal, J., Kristensson, P.O. and Quigley, A. 2013. The potential of fusing computer vision and depth sensing for accurate distance estimation. In Extended Abstracts of the 31st ACM Conference on Human Factors in Computing Systems (CHI 2013). (Works-in-Progress). ACM Press: 1257-1262. (pdf) (publisher)
  34. Kristensson, P.O., Brewster, S., Clawson, J., Dunlop, M., Findlater, L., Isokoski, P., Martin, B., Oulasvirta, A., Vertanen, K. and Waller, A. 2013. Grand challenges in text entry. In Extended Abstracts of the 31st ACM Conference on Human Factors in Computing Systems (CHI 2013). (Workshops). ACM Press: 3315-3318. (pdf) (publisher) (website)
  35. Zhai, S., Kristensson, P.O., Appert, C., Andersen, T.H. and Cao, X. 2012. Foundational issues in touch-surface stroke gesture design - an integrative review. Foundations and Trends in Human-Computer Interaction 5(2): 97-205. ACM Computing Reviews Notable Computing Books and Articles of 2012. Invited. (pdf) (publisher)
  36. Zhai, S. and Kristensson, P.O. 2012. The word-gesture keyboard: reimagining keyboard interaction. Communications of the ACM 55(9): 91-101. Invited. (Research Highlights). (pdf) (publisher) (introduction by Bill Buxton)
  37. Trinh, H., Waller, A., Vertanen, K., Kristensson, P.O. and Hanson, V.L. 2012. iSCAN: a phoneme-based predictive communication aid for nonspeaking individuals. In Proceedings of the 14th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS 2012). ACM Press: 57-64. ACM SIGACCESS Best Student Paper Award. (pdf) (publisher)
  38. Vertanen, K. and Kristensson, P.O. 2012. Spelling as a complementary strategy for speech recognition. In Proceedings of the 13th Annual Conference of the International Speech Communication Association (Interspeech 2012). ISCA: 2294-2297. (pdf) (publisher)
  39. Trinh, H., Waller, A., Vertanen, K., Kristensson, P.O. and Hanson, V.L. 2012. Applying prediction techniques to phoneme-based AAC systems. In Proceedings of the 3rd Workshop on Speech and Language Processing for Assistive Technologies (SLPAT 2012). ACL: 19-27. (pdf) (publisher)
  40. Kristensson, P.O. and Vertanen, K. 2012. The potential of dwell-free eye-typing for fast assistive gaze communication. In Proceedings of the 7th ACM Symposium on Eye-Tracking Research & Applications (ETRA 2012). ACM Press: 241-244. Best Paper Honourable Mention. (pdf) (publisher) (youtube)
  41. Kristensson, P.O., Nicholson, T.F.W. and Quigley, A. 2012. Continuous recognition of one-handed and two-handed gestures using 3D full-body motion tracking sensors. In Proceedings of the 17th ACM International Conference on Intelligent User Interfaces (IUI 2012). ACM Press: 89-92. (pdf) (publisher) (youtube) (source code)
  42. Kristensson, P.O. and Vertanen, K. 2012. Performance comparisons of phrase sets and presentation styles for text entry evaluations. In Proceedings of the 17th ACM International Conference on Intelligent User Interfaces (IUI 2012). ACM Press: 29-32. (pdf) (publisher)
  43. Coyle, D., Moore, J., Kristensson, P.O., Fletcher, P. and Blackwell, A. 2012. I did that! Measuring users' experience of agency in their own actions. In Proceedings of the 30th ACM Conference on Human Factors in Computing Systems (CHI 2012). ACM Press: 2025-2034. Best Paper Honourable Mention. (pdf) (publisher)
  44. Kristensson, P.O, Clawson, J., Dunlop, M., Isokoski, P., Roark, B., Vertanen, K., Waller, A. and Wobbrock, J.O. 2012. Designing and evaluating text entry methods. In Extended Abstracts of the 30th ACM Conference on Human Factors in Computing Systems (CHI 2012). (Workshops). ACM Press: 2747-2750. (pdf) (publisher) (website)
  45. Kristensson, P.O. and Denby, L.C. 2011. Continuous recognition and visualization of pen strokes and touch-screen gestures. In Proceedings of the 8th Eurographics Symposium on Sketch-Based Interfaces and Modeling (SBIM 2011). ACM Press: 95-102. (pdf) (publisher) (source code)
  46. Kristensson, P.O. and Vertanen, K. 2011. Asynchronous multimodal text entry using speech and gesture keyboards. In Proceedings of the 12th Annual Conference of the International Speech Communication Association (Interspeech 2011). ISCA: 581-584. (pdf) (publisher)
  47. Vertanen, K. and Kristensson, P.O. 2011. The imagination of crowds: conversational AAC language modeling using crowdsourcing and large data sources. In Proceedings of the 2011 Conference on Empirical Methods in Natural Language Processing (EMNLP 2011). ACL: 700-711. (pdf) (publisher) (resources) (New Scientist)
  48. Vertanen, K. and Kristensson, P.O. 2011. A versatile dataset for text entry evaluations based on genuine mobile emails. In Proceedings of the 13th ACM International Conference on Human-Computer Interaction with Mobile Devices and Services (MobileHCI 2011). ACM Press: 295-298. (pdf) (publisher) (resources)
  49. Kristensson, P.O. 2011. Design dimensions of intelligent text entry tutors. In Proceedings of the 15th International Conference on Artificial Intelligence in Education (AIED 2011). Lecture Notes in Artificial Intelligence (vol. 6738), Springer: 494-496. (pdf) (publisher)
  50. Jameson, A., Gabrielli, S., Kristensson, P.O., Reinecke, K., Cena, F., Gena, C. and Vernero, F. 2011. How can we support users' preferential choice? In Extended Abstracts of the 29th ACM Conference on Human Factors in Computing Systems (CHI 2011). (alt.chi). ACM Press: 409-418. (pdf) (publisher)
  51. Vertanen, K. and Kristensson, P.O. 2010. Getting it right the second time: recognition of spoken corrections. In Proceedings of the 3rd IEEE Workshop on Spoken Language Technology (SLT 2010). IEEE Press: 277-282. (pdf) (publisher)
  52. Bray, Z. and Kristensson, P.O. 2010. Using ensembles of decision trees to automate repetitive tasks in web applications. In Proceedings of the 2nd ACM SIGCHI Symposium on Engineering Interactive Computing Systems (EICS 2010). ACM Press: 35-40. (pdf) (publisher)
  53. Vertanen, K. and Kristensson, P.O. 2010. Intelligently aiding human-guided correction of speech recognition. In Proceedings of the 24th AAAI Conference on Artificial Intelligence (AAAI 2010). AAAI Press: 1698-1701. (pdf) (publisher) (youtube)
  54. Kristensson, P.O. 2009. Five challenges for intelligent text entry methods. AI Magazine 30(4): 85-94. (pdf) (publisher)
  55. Vertanen, K. and Kristensson, P.O. 2009. Automatic selection of recognition errors by respeaking the intended text. In Proceedings of the 11th Biannual IEEE Workshop on Automatic Speech Recognition and Understanding (ASRU 2009). IEEE Press: 130-135. (pdf) (publisher)
  56. Vertanen, K. and Kristensson, P.O. 2009. Recognition and correction of voice web search queries. In Proceedings of the 10th Annual Conference of the International Speech Communication Association (Interspeech 2009). ISCA: 1863-1866. (pdf) (publisher) (youtube)
  57. Kristensson, P.O., Dahlbäck, N., Anundi, D., Björnstad, M., Gillberg, H., Haraldsson, J., Mårtensson, I., Nordvall, M. and Ståhl, J. 2009. An evaluation of space time cube representation of spatiotemporal patterns. IEEE Transactions on Visualization and Computer Graphics 15(4): 696-702. (pdf) (publisher)
  58. Vertanen, K. and Kristensson, P.O. 2009. Parakeet: a continuous speech recognition system for mobile touch-screen devices. In Proceedings of the 14th ACM International Conference on Intelligent User Interfaces (IUI 2009). ACM Press: 237-246. (pdf) (publisher) (youtube) (The Economist)
  59. Vertanen, K. and Kristensson, P.O. 2009. Parakeet: a demonstration of speech recognition on a mobile touch-screen device. In Proceedings of the 14th ACM International Conference on Intelligent User Interfaces (IUI 2009). (Demonstration). ACM Press: 483-484. (pdf) (publisher) (youtube)
  60. Kristensson, P.O. and Denby, L.C. 2009. Text entry performance of state of the art unconstrained handwriting recognition: a longitudinal user study. In Proceedings of the 27th ACM Conference on Human Factors in Computing Systems (CHI 2009). ACM Press: 567-570. (pdf) (publisher) (video of the talk at CHI)
  61. Spaulding, A., Gajos, K.Z., Jamesson, A., Kristensson, P.O., Bunt, A. and Haines, W. 2009. Usable intelligent interactive systems. In Extended Abstracts of the 27th ACM Conference on Human Factors in Computing Systems (CHI 2009). (Special Interest Group Meeting). ACM Press: 2743-2746. (pdf) (publisher)
  62. Zhai, S., Kristensson, P.O., Gong, P., Greiner, M., Peng, S. and Liu, M. 2009. ShapeWriter on the iPhone - from the laboratory to the real world. In Extended Abstracts of the 27th ACM Conference on Human Factors in Computing Systems (CHI 2009). (Design Practice). ACM Press: 2667-2670. (pdf) (publisher)
  63. Kristensson, P.O., Arnell, O., Björk, A., Dahlbäck, N., Pennerup, J., Prytz, E., Wikman, J. and Åström, N. 2008. InfoTouch: an explorative multi-touch visualization interface for tagged photo collections. In Proceedings of the 5th Nordic Conference on Human-Computer Interaction (NordiCHI 2008). ACM Press: 491-494. (pdf) (publisher) (youtube)
  64. Kristensson, P.O. and Zhai, S. 2008. Improving word-recognizers using an interactive lexicon with active and passive words. In Proceedings of the 13th ACM International Conference on Intelligent User Interfaces (IUI 2008). ACM Press: 353-356. (pdf) (publisher)
  65. Vertanen, K. and Kristensson, P.O. 2008. On the benefits of confidence visualization in speech recognition. In Proceedings of the 26th ACM Conference on Human Factors in Computing Systems (CHI 2008). ACM Press: 1497-1500. (pdf) (publisher) (youtube)
  66. Zhai, S. and Kristensson, P.O. 2008. Interlaced QWERTY - accommodating ease of visual search and input flexibility in shape writing. In Proceedings of the 26th ACM Conference on Human Factors in Computing Systems (CHI 2008). ACM Press: 593-596. (pdf) (publisher)
  67. Sylverberg, T., Kristensson, P.O., Leifler, O. and Berglund, E. 2007. Drawing on paper maps: reliable on-line symbol recognition of handwritten symbols using a digital pen and a mobile phone. In Proceedings of the 2nd International Conference on Pervasive Computing and Applications (ICPCA 2007). IEEE Press: 515-520. (pdf) (publisher)
  68. Kristensson, P.O. and Zhai, S. 2007. Command strokes with and without preview: using pen gestures on keyboard for command selection. In Proceedings of the 25th ACM Conference on Human Factors in Computing Systems (CHI 2007). ACM Press: 1137-1146. (pdf) (publisher) (youtube)
  69. Cockburn, A., Kristensson, P.O., Alexander, J. and Zhai, S. 2007. Hard lessons: effort-inducing interfaces benefit spatial learning. In Proceedings of the 25th ACM Conference on Human Factors in Computing Systems (CHI 2007). ACM Press: 1571-1580. (pdf) (publisher)
  70. Kristensson, P.O. and Zhai, S. 2007. Learning shape writing by game playing. In Extended Abstracts of the 25th ACM Conference on Human Factors in Computing Systems (CHI 2007). (Interactivity). ACM Press: 1971-1976. (pdf) (publisher) (youtube)
  71. Zhai, S. and Kristensson, P.O. 2007. Introduction to shape writing. In MacKenzie, I.S. and Tanaka-Ishii, K. (Eds.), Text Entry Systems. San Francisco: Morgan Kauffman, 139-158. Invited. (publisher)
  72. Kristensson, P.O. and Zhai, S. 2005. Relaxing stylus typing precision by geometric pattern matching. In Proceedings of the 10th ACM International Conference on Intelligent User Interfaces (IUI 2005). ACM Press: 151-158. (pdf) (publisher) (youtube)
  73. Kristensson, P.O. 2005. Breaking the laws of action in the user interface. In Extended Abstracts of the 23rd ACM Conference on Human Factors in Computing Systems (CHI 2005). (Doctoral Consortium). ACM Press: 1120-1121. Best Doctoral Consortium Contribution Award. (pdf) (publisher) (slides)
  74. Zhai, S., Kristensson, P.O. and Smith, B.A. 2005. In search of effective text input interfaces for off the desktop computing. Interacting with Computers 17(3): 229-250. Invited. (pdf) (publisher)
  75. Kristensson, P.O. and Zhai, S. 2004. SHARK2: a large vocabulary shorthand writing system for pen-based computers. In Proceedings of the 17th Annual ACM Symposium on User Interface Software and Technology (UIST 2004). ACM Press: 43-52. 2014 ACM User Interface Software and Technology (UIST) Lasting Impact Award. (pdf) (publisher) (youtube) (BBC) (The New York Times) (slashdot.org) (New Scientist 1) (New Scientist 2) (Time)
  76. Zhai, S. and Kristensson, P.O. 2003. Shorthand writing on stylus keyboard. In Proceedings of the 21st ACM Conference on Human Factors in Computing Systems (CHI 2003). ACM Press: 97-104. (pdf) (publisher) (San Jose Mercury News)

Non-Scholarly Publications

  1. Kristensson, P.O. 2013. Smart phones: it's now the age of the thumb. The World Today 69(5): 10. Chatham House / Royal Institute of International Affairs. Invited. (pdf) (publisher)

Patents

  1. Kristensson, P.O. and Zhai, S. U.S. Patent 9,256,580.
  2. Kristensson, P.O. U.S. Patent 9,158,757.
  3. Kristensson, P.O. and Zhai, S. U.S. Patent 8,712,755.
  4. Kristensson, P.O. and Zhai, S. U.S. Patent 8,543,384.
  5. Kristensson, P.O. and Zhai, S. U.S. Patent 8,311,796.
  6. Kristensson, P.O. U.S. Patent 7,895,518.
  7. Kristensson, P.O. and Zhai, S. U.S. Design Patent D614,645.
  8. Kristensson, P.O. and Zhai, S. U.S. Design Patent D614,644.
  9. Kristensson, P.O., Wang, J. and Zhai, S. U.S. Patent 7,706,616.
  10. Kristensson, P.O. and Zhai, S. U.S. Design Patent D591,307.
  11. Zhai, S. and Kristensson, P.O. U.S. Patent 7,487,461.

Theses

Co-authors with a web presence