Frédéric Mulatero Jean-Marc Thévenin Pierre Bazex A Global Garbage Collector for Federated Database Management Systems. 596-609 http://link.springer.de/link/service/series/0558/bibs/1460/14600596.htm 1998 conf/dexa/1998 DEXA db/conf/dexa/dexa98.html#MulateroTB98