@inproceedings{HCI-CE-1987-Ulich,
	author        = "Eberhard Ulich",
	booktitle     = "{Proceedings of the Second International Conference on Human-Computer Interaction. Volume 2: Cognitive Engineering in the Design of Human-Computer Interaction and Expert Systems}",
	isbn          = "0-444-42848-8",
	pages         = "29--36",
	publisher     = "{Elsevier}",
	title         = "{Individual Differences in Human-Computer Interaction: Concepts and Research Findings}",
	year          = 1987,
}