conf/sigmod/92 Michael Gesmann Andreas Grasnickel Theo Härder Christoph Hübel Wolfgang Käfer Bernhard Mitschang Harald Schöning PRIMA - A Database System Supporting Dynamically Defined Composite Objects. 5 1992 SIGMOD Conference db/conf/sigmod/sigmod92.html#GesmannGHHKMS92 http://doi.acm.org/10.1145/130283.130287 db/conf/sigmod/GesmannGHHKMS92.html SIGMOD92/P005.PDF conf/vldb/HarderMMS87 conf/dpds/HarderSS88 conf/eds/Mitschang88 conf/vldb/Mitschang89 conf/dood/Schoning89