conf/sigmod/90 Amihai Motro Qiuhui Yuan Querying Database Knowledge. 173-183 1990 SIGMOD Conference db/conf/sigmod/sigmod90.html#MotroY90 http://doi.acm.org/10.1145/93597.98727 db/conf/sigmod/MotroY90.html SIGMOD90/P173.PDF journals/debu/ChimentiOKTWZ87 conf/eds/CholvyD86 conf/eds/Corella84 journals/jlp/Imielinski87 journals/is/MinkerN83 journals/debu/MorrisNSUG87 conf/vldb/Motro89 conf/icde/PirotteR89 journals/debu/RamamohanaraoSBPNTZD87 journals/debu/RamnarayanL87 journals/debu/SaccaDMPGN87 conf/eds/ShumM88 conf/vldb/ShumM88 books/cs/Ullman88