Yanfeng Zheng Chun Shao An Efficient Round-Robin Algorithm for Combined Input-Crosspoint-Queued Switches. 2 2005 conf/icas/2005 ICAS/ICNS http://doi.ieeecomputersociety.org/10.1109/ICAS-ICNS.2005.19 db/conf/icas/icas-icns2005.html#ZhengS05