Pavlin Radoslavov Christos Papadopoulos Ramesh Govindan Deborah Estrin A Comparison of Application-Level and Router-Assisted Hierarchical Schemes for Reliable Multicast. 229-238 2001 INFOCOM http://www.ieee-infocom.org/2001/paper/775.ps db/conf/infocom/infocom2001-1.html#RadoslavovPGE01