Fabien De Marchi Stéphane Lopes Jean-Marc Petit Farouk Toumani Analysis of existing databases at the logical level: the DBA companion project. 47-52 2003 32 SIGMOD Record 1 http://doi.acm.org/10.1145/640990.640997 db/journals/sigmod/sigmod32.html#MarchiLPT03