1. ACTS SIA Guideline 3 “Enterprise Models of Electronic Brokerage” Edited by S. Plagemann and J. Hands. Version 1.6, September 1997
2. MULTIMEDIATOR Document A0096/UPC/DAC/PI/I/031/a1 “Contribution to SIA Guideline 3”, May 1997
3. MULTIMEDIATOR Document A0096/UPC/DAC/PI/I/038/a1 “Application and Middleware functions for electronic brokerage-A MULTIMEDIATOR contribution to SIA-G3”, September 1997
4. Delgado J., Gallego I. and Acebrón J.J. “Electronic Commerce of Multimedia Products”, 7th IFIP/ICCC Conference on Information Networks and Data Communications (INDC’98), 1998 Aveiro (Portugal). ICCC Press, ISBN 1-891365-03-7
5. Delgado J., Gallego I. and Polo J. “Electronic Commerce of Multimedia Services” 7th International Conference on Multimedia Modeling (MMM’99) 4-6 October 1999, Ottawa, Ontario (Canada). World Scientific, ISBN 981-02-4146-1