Stéphane Grumbach Victor Vianu Playing Games with Objects. 25-38 ICDT1990/P025.pdf 1990 ICDT db/conf/icdt/icdt90.html#GrumbachV90 conf/icdt/90 http://dx.doi.org/10.1007/3-540-53507-1_68 journals/vldb/AbiteboulB95 ... ... ... conf/pods/GrumbachV91 conf/pods/HullS88 conf/pods/HullS89 journals/iandc/Immerman86 ... conf/pods/KuperV84 conf/icdt/KuperV88 conf/pods/ParedaensG88 conf/stoc/Vardi82