conf/sigmod/88 D. Jagannathan R. L. Guck B. L. Fritchman J. P. Thompson D. M. Tolbert SIM: A Database System Based on the Semantic Data Model. 46-55 1988 SIGMOD Conference db/conf/sigmod/sigmod88.html#JagannathanGFTT88 http://doi.acm.org/10.1145/50202.50207 db/conf/sigmod/JagannathanGFTT88.html SIGMOD88/P046.PDF ... conf/icde/BanerjeeKK88 journals/tods/Chen76 journals/tods/Codd79 ... conf/pods/DayalGK82 conf/er/ElmasriW81 journals/tois/FishmanBCCCDDHKLMNRS87 conf/sigmod/GoldmanGKZ85 journals/tods/HammerM81 journals/tods/Kent79 ... journals/tods/MylopoulosBW80 journals/tods/Shipman81 ... journals/tods/SmithS77 ... conf/sigmod/TsurZ84