Carlo Meghini Costantino Thanos The Complexity of Operations on a Fragmented Relation. 56-87 1991 16 ACM Trans. Database Syst. 1 db/journals/tods/tods16.html#MeghiniT91 http://doi.acm.org/10.1145/103140.103143 db/journals/tods/MeghiniT91.html TODS16/P056.PDF conf/icod/BertinoMT83 journals/tods/CeriP83 books/mg/CeriP84 journals/cacm/Codd70 books/fm/GareyJ79 ... conf/sigmod/MaierU83 journals/acta/MeghiniT85 journals/tods/RothnieBFGHLRSW80 books/cs/Ullman82