Gail M. Shaw Stanley B. Zdonik An Object-Oriented Query Algebra. 103-112 DBPL1989/P103.pdf 1989 DBPL db/conf/dbpl/dbpl89.html#ShawZ89 conf/dbpl/89 db/conf/dbpl/ShawZ89.html journals/vldb/AbiteboulB95 conf/sigmod/AbiteboulK89 journals/tods/AlbanoCO85 conf/vldb/BancilhonBKV87 conf/icde/BanerjeeKK88 conf/sigmod/CareyDV88 conf/oodbs/GraefeM88 conf/pods/JaeschkeS82 conf/oopsla/KhoshafianC86 conf/oodbs/Korth88 conf/sigmod/LecluseRV88 books/mit/shriverW87/MaierS87 conf/oodbs/Osborn88 conf/icde/ShawZ90 conf/sigmod/Zaniolo83 ... ...