@inproceedings{ECHT-1990-Andersen,
	author        = "Peter Bøgh Andersen",
	booktitle     = "{Proceedings of the European Conference on Hypertext: Concepts, Systems and Applications}",
	isbn          = "0-521-40517-3",
	pages         = "224--237",
	publisher     = "{Cambridge University Press}",
	series        = "{The Cambridge Series on Electronic Publishing}",
	title         = "{Towards an Aesthetics of Hypertext Systems. A Semiotic Approach}",
	year          = 1990,
}