Henri Habrias Patrick Legrand A Description of Rules through Occurring/Synthetic Cardinalities. 509-525 1988 ER db/conf/er/er88.html#HabriasL88 conf/er/88 db/conf/er/HabriasL88.html er88/ER88-P509.pdf ... books/el/Ceri83 conf/er/79 conf/er/81 conf/er/83 conf/er/86 conf/er/BrunoE86 conf/er/FeldmanF85 conf/er/MeesP86 conf/er/RyanL86 ... ... journals/cacm/Ahituv87 ... ... ... ... ... ... ... ... conf/er/BriandHHS85