What are some other references for event service?
Object Management Group, December 11, 1997.
By Yeturu Aahlad, Mod Marathe, Bruce Martin and Chung Le. In Proceedings of the 2nd USENIX Conference on Object-Oriented Technologies and Systems, June 17, 1996, Toronto, Canada.
By Doug Schmidt's & David Levine and Tim Harrison in Proceedings of OOPSLA '97, Atlanta, Georgia, October, 1997.