El-Bahlul Fgee William J. Phillips William Robertson Comparison between a Proposed QoS Mathematical Model and other IP QoS Models. 595-599 2008 CNSR http://doi.ieeecomputersociety.org/10.1109/CNSR.2008.92 conf/cnsr/2008 db/conf/cnsr/cnsr2008.html#FgeePR08