Malte Weiss, Julie Wagner, Yvonne Jansen, Roger Jennings, Ramsin Khoshabeh, James D. Hollan, Jan O. Borchers. SLAP widgets: bridging the gap between virtual and physical controls on tabletops. In Dan R. Olsen Jr., Richard B. Arthur, Ken Hinckley, Meredith Ringel Morris, Scott E. Hudson, Saul Greenberg, editors, Proceedings of the 27th International Conference on Human Factors in Computing Systems, CHI 2009, Boston, MA, USA, April 4-9, 2009. pages 481-490, ACM, 2009. [doi]