@inproceedings{INTERCHI-1993-NielsenL,
	author        = "Jakob Nielsen and Thomas K. Landauer",
	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           = "10.1145/169059.169166",
	isbn          = "0-89791-575-5",
	pages         = "206--213",
	publisher     = "{ACM}",
	title         = "{A mathematical model of the finding of usability problems}",
	year          = 1993,
}