Kojiro Taguchi Tomoya Enokido Makoto Takizawa Hierarchical Protocol for Broadcast-Type Group Communication. 21-28 2003 conf/icppw/2003 ICPP Workshops http://csdl.computer.org/comp/proceedings/icppw/2003/2018/00/20180021abs.htm db/conf/icppw/icppw2003.html#TaguchiET03