G. Piao, K. David, I. Karla, и R. Sigle. Proceedings of the 17th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2006), Helsinki, Finland, (Сентябрь 2006)
T. Loeffler, S. Sigg, S. Haseloff, и K. David. Proceedings of the 2nd Workshop on Context Awareness for Proactive Systems CAPS 2006, Kassel, (Июнь 2006)
O. Drogehorn, и K. David. SAINT-W '05: Proceedings of the 2005 Symposium on Applications and the Internet Workshops, стр. 132--135. Washington, DC, USA, IEEE Computer Society, (2005)
M. Sutterer, O. Droegehorn, и K. David. AICT '08: Proceedings of the 2008 Fourth Advanced International Conference on Telecommunications, стр. 299--304. Washington, DC, USA, IEEE Computer Society, (2008)
K. David, O. Drogehorn, и M. Klemettinen. SAINT-W '07: Proceedings of the 2007 International Symposium on Applications and the Internet Workshops, стр. 9. Washington, DC, USA, IEEE Computer Society, (2007)
S. Lau, и K. David. Assistive and Augmentive Communication for the Disabled: Intelligent Technologies for Communication, Learning and Teaching, глава 6, IGI Global, (Май 2011)
M. Sutterer, O. Droegehorn, и K. David. ACHI '08: Proceedings of the First International Conference on Advances in Computer-Human Interaction, стр. 230--235. Washington, DC, USA, IEEE Computer Society, (2008)