conf/vldb/89 M. Muralikrishna Optimization and Dataflow Algorithms for Nested Tree Queries. 77-85 1989 VLDB db/conf/vldb/vldb89.html#Muralikrishna89 db/conf/vldb/Muralikrishna89.html VLDB89/P077.PDF journals/cacm/AstrahanC75 conf/vldb/Dayal87 conf/vldb/DeWittGGHKM86 conf/sigmod/GanskiW87 ... ... journals/tods/Kim82