Alain Wegmann, Guy Genilloud. The Roles of Roles in Use Case Diagrams. In Andy Evans, Stuart Kent, Bran Selic, editors, «UML» 2000 - The Unified Modeling Language, Advancing the Standard, Third International Conference, York, UK, October 2-6, 2000, Proceedings. Volume 1939 of Lecture Notes in Computer Science, pages 210-224, Springer, 2000. [doi]
Abstract is missing.