1. Beaumont I. (1994) User modelling in the interactive anatomy tutoring system Anatom-Tutor. In User modeling and user adapted interaction, 4: 1994, (p. 21–45).
2. Boecker H.-D., Hohl H. and Schwab T. (1990) Hypadapter — Individualizing Hypertext. In Diaper D. et al (ed.) INTERACT’90. Proceedings of the the IFIP TC13 Third International Conference on Human-Computer Interaction. North-Holland, Amsterdam. 931–936.
3. Boyle C. and Encarnacion A.O. (1994) MetaDoc: an adaptive hypertext reading system. In User modeling and user adapted interaction, 4: 1994.
4. Brusilovsky P.L. (1992) Intelligent Tutor, Environment and Manual for Introductory Programming. Educational and Training Technology International, 29 (1), 26–34
5. Brusilovsky P., Pesin L., and Zyryanov M. (1993) Towards an adaptive hypermedia component for an intelligent learning environment. In Bass L.J., Gornostaev J. and Unger C. (eds.) Human-Computer Interaction. Lecture Notes in Computer Science #753, Springer-Verlag, Berlin, (p. 348–358).