1. Arend, U., K-P. Muthig and J. Wandmacher: 1987, ?Evidence for Global Feature Superiority in Menu Selection by Icons?.Behaviour and Information Technology 6, 411?426.
2. Barnard, P. J.: 1987, ?Cognitive Resources and the Learning of Computer Dialogues?. In: J. M. Carroll (ed):Interfacing Thought: Cognitive Aspects of Human Computer Interaction. Cambridge, MA: Cambridge Univ. Press, pp. 112?158.
3. Barnard, P. J., J. Grudin and A. MacLean: 1989, ?Developing a Science Base for the Naming of Computer Commands?. In: J.B. Long and A. Whitefield (eds.):Cognitive Ergonomics and Human Computer Interaction. Cambridge, MA: Cambridge Univ. Press, pp. 95?133.
4. Barnard, P. J., A, MacLean and N. V. Hammond: 1984, ?User Representations of Ordered Sequences of Command Operations?. In: B. Shackel (ed):Proceedings of Interact '84: First IFIP Conference on Human-Computer Interaction, Volume 1. London: IEE, pp. 434?438.
5. Barnard, P. J. and J. Teasdale: 1991, ?Interacting Cognitive Subsystems: A Systemic Approach to Cognitive Affective Interaction and Change?.Cognition and Emotion 5(1), 1?39.