conf/vldb/94 Zhaohui Xie Jiawei Han Join Index Hierarchies for Supporting Efficient Navigations in Object-Oriented Databases. 522-533 1994 VLDB db/conf/vldb/vldb94.html#XieH94 db/conf/vldb/vldb94-522.html VLDB94/P522.PDF conf/icde/Bertino91 journals/tkde/BertinoK89 conf/sigmod/CluetD92 journals/csur/Graefe93 conf/sigmod/KellerGM91 conf/sigmod/KemperM90 conf/vldb/KemperM90 books/aw/kimL89/KimKD89 conf/icde/LuH92 conf/oodbs/MaierS86 conf/vldb/PalmerZ91 conf/icde/Rotem91 conf/icde/ShawZ90 conf/sigmod/ShekitaC89 journals/tois/StraubeO90 journals/tods/Valduriez87 conf/sigmod/VandenbergD91 journals/cacm/Yao77