Guangping Wei Toby J. Teorey The ORAC Model: A Unified View of Data Abstraction. 31-58 1991 ER db/conf/er/er91.html#WeiT91 conf/er/91 db/conf/er/WeiT91.html er91/ER91-P031.pdf journals/csur/TsichritzisL76 ... ... journals/cacm/Codd70 journals/tods/Chen76 conf/ds/Abrial74 ... journals/tods/Shipman81 journals/tods/HammerM81 journals/tois/FishmanBCCCDDHKLMNRS87 books/aw/KimL89 conf/oopsla/MaierSOP86 ... journals/dke/ElmasriWH85 conf/er/DittrichGL86 journals/csur/TeoreyYF86 ... conf/er/ParentRYS89 journals/tse/TeichroewH77 ... conf/er/GolgsteinS89 journals/cacm/TeoreyWBK89 ...