1. Hypertext and pluralism: from lineal to non-lineal thinking;Beeman,1987
2. Semantic networking: the new kid on the block;Fisher;Paper presented to the NATO Advanced Research Workshop on Mindtools, Twente University, The Netherlands,1990
3. HYP/23 Final Report on Hypermedia (HYPERATE): the SAFE project;Kibby;DELTA project P7061 (D1014),1991
4. Evaluating hypermedia-based learning;Marchionini,1990
5. An approach to the evaluation of hypermedia;Knussen;Computers Educ.,1991