@inproceedings{CHI-1991-TangM,
	author        = "John C. Tang and Scott L. Minneman",
	booktitle     = "{Proceedings of the Ninth ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/108844.108932",
	isbn          = "0-89791-383-3",
	pages         = "315--322",
	publisher     = "{ACM}",
	title         = "{VideoWhiteboard: video shadows to support remote collaboration}",
	year          = 1991,
}