Jeffrey D. Ullman Implementation of Logical Query Languages for Databases. 289-321 TODS10/P289.PDF 1985 10 ACM Trans. Database Syst. 3 db/journals/tods/tods10.html#Ullman85 http://doi.acm.org/10.1145/3979.3980 db/journals/tods/Ullman85.html conf/popl/AhoU79 conf/pods/ChandraH82 conf/adbt/Chang79 conf/adbt/Clark77 ... ... journals/jacm/HenschenN84 journals/jacm/Kowalski75 ... ... ... ... conf/adbt/Reiter77 conf/adbt/Reiter77a ... ... ... journals/siamcomp/Tarjan72 conf/slp/TaylorLMS84 books/cs/Ullman82 ... journals/jacm/EmdenK76