@inproceedings{HT-1998-BraC,
	author        = "Paul De Bra and Licia Calvi",
	booktitle     = "{Proceedings of the Ninth Conference on Hypertext and Hypermedia: Links, Objects, Time and Space — Structure in Hypermedia Systems}",
	cdrom         = "HT1998/P283.pdf",
	doi           = "10.1145/276627.276660",
	pages         = "283--284",
	publisher     = "{ACM}",
	title         = "{2L670: A Flexible Adaptive Hypertext Courseware System}",
	year          = 1998,
}