@inproceedings{CHI-2007-PattenI,
	author        = "James Patten and Hiroshi Ishii",
	booktitle     = "{Proceedings of the 25th ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/1240624.1240746",
	isbn          = "978-1-59593-593-9",
	pages         = "809--818",
	publisher     = "{ACM}",
	title         = "{Mechanical constraints as computational constraints in tabletop tangible interfaces}",
	year          = 2007,
}