@inproceedings{CHI-1999-Horvitz,
	author        = "Eric Horvitz",
	booktitle     = "{Proceedings of the 17th ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/302979.303030",
	isbn          = "0-201-48559-1",
	pages         = "159--166",
	publisher     = "{ACM}",
	title         = "{Principles of Mixed-Initiative User Interfaces}",
	year          = 1999,
}