http://doi.acm.org/10.1145/130868.130872 db/journals/sigmod/ParedaensBAGGTGSS92.html Jan Paredaens Jan Van den Bussche Marc Andries Marc Gemis Marc Gyssens Inge Thyssens Dirk Van Gucht Vijay M. Sarathy Lawrence V. Saxton An Overview of GOOD. 25-31 sigmodR/21-1/P025.pdf 1992 21 SIGMOD Record 1 db/journals/sigmod/sigmod21.html#ParedaensBAGGTGSS92