John C. Tang, Scott L. Minneman. VideoWhiteboard: video shadows to support remote collaboration. In Scott P. Robertson, Gary M. Olson, Judith S. Olson, editors, Conference on Human Factors in Computing Systems, CHI 1991, New Orleans, LA, USA, April 27 - May 2, 1991, Proceedings. pages 315-322, ACM, 1991. [doi]
Abstract is missing.