conf/pods/97 Marc Gyssens Jan Van den Bussche Dirk Van Gucht Complete Geometrical Query Languages. 62-67 1997 PODS db/conf/pods/pods97.html#GyssensBG97 http://doi.acm.org/10.1145/263661.263669 db/conf/pods/GyssensBG97.html journals/anthology/cd1-3:PODS97/P062.PDF journals/anthology/dvd1:text/1-3/PODS97/P062.PDF journals/jcss/AbiteboulV90 journals/jcss/ChandraH80 ... journals/jcss/KanellakisKR95 ... conf/pods/PapadimitriouSV96 conf/pods/ParedaensBG94 ... ... ... ...