Published in:

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HYPERTEXT '98 Proceedings of the ninth ACM conference on Hypertext and hypermedia : links, objects, time and space---structure in hypermedia systems: links, objects, time and space---structure in hypermedia systems
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Pages 30-39
ACM New York, NY, USA ©1998
table of contents
ISBN:0-89791-972-6
doi>10.1145/276627.276631
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