Aiguo Fei Mario Gerla Extending BGMP for Shared-Tree Inter-Domain QoS Multicast. 123-139 2001 conf/iwqos/2001 IWQoS http://link.springer.de/link/service/series/0558/bibs/2092/20920123.htm db/conf/iwqos/iwqos2001.html#FeiG01