@inproceedings{INTERCHI-1993-HopperHB,
	author        = "Andy Hopper and Andy Harter and Tom Blackie",
	booktitle     = "{Proceedings of the 11th ACM SIGCHI Conference on Human Factors in Computing Systems, jointly organised with the IFIP TC13 International Conference on Human-Computer Interaction}",
	doi           = "10.1145/169059.169535",
	isbn          = "0-89791-575-5",
	pages         = "533--534",
	publisher     = "{ACM}",
	title         = "{The active badge system}",
	year          = 1993,
}