Andreas Steiner Adrian Kobler Moira C. Norrie OMS/Java: Model Extensibility of OODBMS for Advanced Application Domains. 115-138 http://link.springer.de/link/service/series/0558/bibs/1413/14130115.htm 1998 conf/caise/1998 CAiSE db/conf/caise/caise98.html#SteinerKN98