@inproceedings{HCI-EI-1999-SpeitelIK,
	author        = "Thomas Speitel and Marie Iding and Barbara Klemm",
	booktitle     = "{Proceedings of the Eighth International Conference on Human-Computer Interaction. Volume 1: Ergonomics and User Interfaces}",
	isbn          = "0-8058-3391-9",
	pages         = "372--375",
	publisher     = "{Lawrence Erlbaum}",
	title         = "{Hypermedia Enhancement of a Print-Based Constructivist Science Textbook}",
	year          = 1999,
}