Mihai Barbuceanu Tom Gray Serge Mankovski Providing Telecommunication Services through Multi-agent Negotiation. 124-136 http://link.springer.de/link/service/series/0558/bibs/1699/16990124.htm 1999 conf/iata/1999 IATA db/conf/iata/iata1999.html#BarbuceanuGM99