@inproceedings{HT-1989-Travers,
	author        = "Michael Travers",
	booktitle     = "{Proceedings of the Second Conference on Hypertext}",
	cdrom         = "HT1989/P147.pdf",
	doi           = "10.1145/74224.74237",
	isbn          = "0-89791-339-6",
	pages         = "147--158",
	publisher     = "{ACM}",
	title         = "{A Visual Representation for Knowledge Structures}",
	year          = 1989,
}