Igor Hawryszkiewycz A Computer-Aid for E-R Modeling. 64-69 1985 ER db/conf/er/er85.html#Hawryszkiewycz85 conf/er/85 er85/ER85-P064.pdf db/conf/er/Hawryszkiewycz85.html ... journals/is/BatiniLS82 journals/tods/Chen76 ... journals/debu/ReinerBBFKLR84 conf/vldb/JooPM84