1. Peter Feöhlich, N. Henze and W. Nejdl, Meta Modeling for Hypermedia, University of Hannover- Germany (1996)
2. G. Falquet, J. Hurni, J. Guyot, L. Nerima, Learning by creating multipoint of view scientific Hyperbooks, Universit de Gen ve (2001)
3. Peter Brusilovsky, Methods and techniques of adaptive hypermedia, User Modeling and Usar Adapted Interaction, 1996, v 6, n 2-3 pp 87–129
4. Wolfgang and Martin Wolpers Christian Capelle, RDF Metadata, Semantic Data Models and Structured Hypertext, Institut fur Rechnergestutzte Wissensverarbeitung, University of Hannover, 1999
5. Tim Berners-Lee, James Hendler and Ora Lassila, The Semantic Web, Scientific American, May 2001