Bharat T. Doshi Dominik Eggenschwiler Aswath Rao Behrokh Samadi Yung-Terng Wang James Wolfson VoIP network architectures and QoS strategy. 41-59 2003 7 Bell Labs Technical Journal 3 http://dx.doi.org/10.1002/bltj.10033 db/journals/bell/bell7.html#DoshiERSWW03