Ramon Martí, Jaime Delgado. Definition of Service Levels for Electronic Brokerage Applications. In Sebastiano Trigila, Alvin P. Mullery, Mário Campolargo, Hans Vanderstraeten, Marcel Mampaey, editors, Intelligence in Services and Networks: Technology for Ubiquitous Telecom Services, 5th International Conference on Intelligence and Services in Networks, IS&N 98, Antwerp, Belgium, May 25-28, 1998, Proceedings. Volume 1430 of Lecture Notes in Computer Science, pages 351-362, Springer, 1998. [doi]