Vijay M. Sarathy Lawrence V. Saxton Dirk Van Gucht Algebraic Foundation and Optimization for Object Based Query Languages. 81-90 ICDE93/P081.pdf 1993 ICDE db/conf/icde/icde93.html#SarathySG93 conf/icde/93 db/conf/icde/SarathySG93.html conf/nf2/87 conf/dbpl/BancilhonCD89 conf/icdt/BeeriK90 conf/sigmod/CopelandK85 conf/dbpl/Dayal89 conf/icde/GuoSL91 conf/pods/GyssensPG90 books/mk/freytagMV91/GyssensSG91 ... ... journals/debu/ShawZ89 journals/tods/Shipman81 ... conf/vldb/ValduriezKC86 conf/sigmod/VandenbergD91