@inproceedings{CHI-1991-JeffriesMWU,
	author        = "Robin Jeffries and James R. Miller and Cathleen Wharton and Kathy Uyeda",
	booktitle     = "{Proceedings of the Ninth ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/108844.108862",
	isbn          = "0-89791-383-3",
	pages         = "119--124",
	publisher     = "{ACM}",
	title         = "{User interface evaluation in the real world: a comparison of four techniques}",
	year          = 1991,
}