@inproceedings{CHI-1994-BierSFBB94a,
	author        = "Eric A. Bier and Maureen C. Stone and Kenneth P. Fishkin and William Buxton and Thomas Baudel",
	booktitle     = "{Proceedings of the 12th ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/191666.191786",
	isbn          = "0-89791-650-6",
	pages         = "358--364",
	publisher     = "{ACM}",
	title         = "{A taxonomy of see-through tools}",
	year          = 1994,
}