@inproceedings{HT-2000-Willerton,
	author        = "Chris Willerton",
	booktitle     = "{Proceedings of the 11th Conference on Hypertext and Hypermedia}",
	doi           = "10.1145/336296.336394",
	pages         = "234--235",
	publisher     = "{ACM}",
	title         = "{Structure problems in hypertext mysteries}",
	year          = 2000,
}