Lijing Ding Ayman Radwan Mohamed Samy El-Hennawey Rafik A. Goubran Performance Study of Objective Voice Quality Measures in VoIP. 197-202 2007 ISCC http://dx.doi.org/10.1109/ISCC.2007.4381543 conf/iscc/2007 db/conf/iscc/iscc2007.html#DingREG07