@inproceedings{CHI-1998-UnderkofflerI,
	author        = "John Underkoffler and Hiroshi Ishii",
	booktitle     = "{Proceedings of the 16th ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/274644.274717",
	isbn          = "0-201-30987-4",
	pages         = "542--549",
	publisher     = "{ACM}",
	title         = "{Illuminating Light: An Optical Design Tool with a Luminous-Tangible Interface}",
	year          = 1998,
}