P. Ehlen, M. Purver, and J. Niekrasz. Interaction Challenges for Intelligent Assistants, volume SS-07-04 of AAAI Technical Report, page 33-40. AAAI Press, (2007)
V. Kalnikait\.e, P. Ehlen, and S. Whittaker. Proceedings of the ACM 2012 conference on Computer Supported Cooperative Work, page 349--358. New York, NY, USA, ACM, (2012)
P. Ehlen, and M. Johnston. Proceedings of the 16th international conference on Intelligent user interfaces, page 435--436. New York, NY, USA, ACM, (2011)
M. Johnston, S. Bangalore, A. Stent, G. Vasireddy, and P. Ehlen. Proceedings of ICSLP---Interspeech 2002: 7th International Conference on Spoken Language Processing, Denver, CO, USA, page 2237-2240. (2002)
P. Ehlen, M. Johnston, and G. Vasireddy. Proceedings of ICSLP---Interspeech 2002: 7th International Conference on Spoken Language Processing, Denver, CO, USA, page 2557-2560. (2002)
P. Ehlen, R. Zajac, and K. Rao. Proceedings of the Second International Workshop on Location and the Web (LocWeb 2009), page 17-19. Boston, Massachusetts, (April 2009)
J. Linebarger, A. Scholand, M. Ehlen, and M. Procopio. GROUP '05: Proceedings of the 2005 international ACM SIGGROUP conference on Supporting group work, page 51--60. New York, NY, USA, ACM Press, (2005)