A Simple Model for Adaptive Courseware Navigation. - Denise Pilar da Silva; Rafaël Van Durm; Koen Hendrikx; Erik Duval; Henk J. Olivié (WebNet, 1997)

Adaptive Navigational Facilities in Educational Hypermedia. - Denise Pilar da Silva; Rafaël Van Durm; Erik Duval; Henk J. Olivié (Hypertext, 1998)