conf/sigmod/79 Edward Sciore Improving Semantic Specification in a Relational Database. 170-178 1979 SIGMOD Conference db/conf/sigmod/sigmod79.html#Sciore79 SIGMOD79/P170.PDF http://doi.acm.org/10.1145/582095.582124 conf/vldb/BachmanD77 journals/tods/Bernstein76 ... conf/mfcs/Cadiou76 conf/sigmod/LeeG78 journals/tods/SmithS77 conf/vldb/Smith78b ...