1. The evaluation of a hypermedia learning environment: the CESAR experience;Aedo;Journal of Educational Multimedia and Hypermedia,1996
2. Antchev, K., Luhtalahti, M., Multisilta, J., Pohjolainen. S. & Suomela, K. (1995). A WWW Learning Environment for Mathematics. World Wide Web Journal, Fourth International World Wide Web Conference Proceedings, Boston, Dec., pp. 251-258
3. Benyon, D., Davies, G., Keller, L. & Rogers, Y. (1990). A guide to usability—Usability Now! The Open University, Milton Keynes (UK)
4. The evaluation of electronic books. Guidelines from two practical experiences;Catenazzi;Journal of Educational Multimedia and Hypermedia,1997
5. Hyper-book: an experience in designing and evaluating electronic books;Catenazzi;Journal of Document and Text Management,1994