Eric M. Jones, Ted Selker, Hyemin Chung. What you said about where you shook your head: a hands-free implementation of a location-based notification system. In Mary Beth Rosson, David J. Gilmore, editors, Extended Abstracts Proceedings of the 2007 Conference on Human Factors in Computing Systems, CHI 2007, San Jose, California, USA, April 28 - May 3, 2007. pages 2477-2482, ACM, 2007. [doi]
Abstract is missing.