conf/sigmod/89 Victor M. Markowitz Arie Shoshani On the Correctness of Representing Extended Entity-Relationship Structures in the Relational Model. 430-439 1989 SIGMOD Conference db/conf/sigmod/sigmod89.html#MarkowitzS89 http://doi.acm.org/10.1145/67544.66967 db/conf/sigmod/MarkowitzS89.html SIGMOD89/P430.PDF conf/pods/AtzeniP82 conf/vldb/BeeriBG78 conf/er/Brady85 journals/jcss/CasanovaFP84 journals/tods/Chen76 journals/tods/Codd79 conf/stoc/CosmadakisK85 ... conf/pods/Hull84 journals/csur/HullK87 journals/tse/JajodiaNS83 ... ... ... books/cs/Maier83 journals/acr/MaierRW86 journals/tods/MaierUV84 ... journals/csur/TeoreyYF86 books/cs/Ullman82