conf/sigmod/87 Domenico Saccà Carlo Zaniolo 49-59 1987 SIGMOD Conference db/conf/sigmod/sigmod87.html#SaccaZ87 SIGMOD87/P049.PDF http://doi.acm.org/10.1145/38713.38725 db/conf/sigmod/SaccaZ87.html ... journals/jlp/BalbinR87 conf/pods/BancilhonMSU86 conf/sigmod/BancilhonR86 journals/jacm/HenschenN84 ... conf/pods/Marchetti-SpaccamelaPS87 conf/pods/SaccaZ86 conf/icdt/SaccaZ86 conf/iclp/SaccaZ87 journals/siamcomp/Tarjan72 conf/vldb/TsurZ86 journals/tods/Ullman85 journals/jacm/EmdenK76