Michael Schrefl Erich J. Neuhold Object Class Definition by Generalization Using Upward Inheritance. 4-13 ICDE88/P004.pdf 1988 ICDE db/conf/icde/icde88.html#SchreflN88 conf/icde/88 db/conf/icde/SchreflN88.html conf/oopsla/BobrowKKMSZ86 ... journals/tse/BatiniL84 ... journals/tods/Codd79 ... ... journals/tse/DayalH84 journals/dke/ElmasriWH85 journals/cacm/FikesK85 ... books/aw/GoldbergR83 journals/tods/HammerM81 journals/computer/LitwinA86 conf/ddb/LandersR82 journals/tods/MylopoulosBW80 books/cs/Maier83 journals/dke/ManninoK85 conf/oopsla/Moon86 conf/oopsla/MaierSOP86 journals/computer/NavatheEL86 conf/ds/Neuhold85 ... ... journals/tods/Shipman81 journals/tods/SmithS77 ... journals/tse/YaoWH82