Efforts Towards on Open Electronic Commerce Infrastructure for the Tourism Industry. - Penelope Constanta; Manolis Marazakis; Dimitris Papadakis; Christos Nikolaou; Dietmar Boenke (DEXA Workshop, 1998)

System-Level Infrastructure Issues for Controlled Interactions among Autonomous Participants in Electronic Commerce Processes. - Manolis Marazakis; Dimitris Papadakis; Christos Nikolaou; Penelope Constanta (DEXA Workshop, 1999)