Manolis Marazakis Dimitris Papadakis Christos Nikolaou Penelope Constanta System-Level Infrastructure Issues for Controlled Interactions among Autonomous Participants in Electronic Commerce Processes. 613-617 1999 DEXA Workshop http://computer.org/conferen/proceed/dexa/0281/02810613abs.htm db/conf/dexaw/dexaw99.html#MarazakisPNC99