Keijirou Arai Katsuya Tanaka Makoto Takizawa Group Protocol for Delivering Requests to Replicas. 724-735 2002 conf/icoin/2002-2 ICOIN (2) http://link.springer.de/link/service/series/0558/bibs/2344/23440724.htm db/conf/icoin/icoin2002-2.html#AraiTT02