1. Hypertext;Nielsen;Commun. ACM,1990
2. Navigation and browsing in Hypertext;McAleese,1989
3. Characterising user navigation through complex data structures;Canter;Behav. Informn Technol.,1985
4. Hypercourseware management systems: Course Browser;Siviter,1991
5. Travels around a learning support environment;Hammond,1988