Henri Tobiet Pascal Lorenz Performance Measurement Methodologies and Quality of Service Evaluation in VoIP and Desktop Videoconferencing Networks. 92-107 2000 conf/networking/2000w Mobile and Wireless Communication Networks http://link.springer.de/link/service/series/0558/bibs/1818/18180092.htm db/conf/networking/mwcn2000.html#TobietL00