Ralph Keller Sumi Choi Dan Decasper Marcel Dasen George Fankhauser Bernhard Plattner An Active Router Architecture for Multicast Video Distribution. 1137-1146 2000 INFOCOM http://www.ieee-infocom.org/2000/papers/691.ps db/conf/infocom/infocom2000-3.html#KellerCDDFP00