@conference {17218,
	title = {Identifying aggregates in hypertext structures},
	booktitle = {Proceedings of the third annual ACM conference on Hypertext},
	series = {HYPERTEXT {\textquoteright}91},
	year = {1991},
	month = {1991///},
	pages = {63 - 74},
	publisher = {ACM},
	organization = {ACM},
	address = {New York, NY, USA},
	isbn = {0-89791-461-9},
	doi = {10.1145/122974.122981},
	url = {http://doi.acm.org/10.1145/122974.122981},
	author = {Botafogo,Rodrigo A. and Shneiderman, Ben}
}
