Stefan Fricke Karsten Bsufka Jan Keiser Torge Schmidt Ralf Sesseler Sahin Albayrak Agent-based telematic services and telecom applications. 43-48 2001 44 Commun. ACM 4 http://doi.acm.org/10.1145/367211.367251 db/journals/cacm/cacm44.html#FrickeBKSSA01