Dimitris Dervos Papers on DiSC'04 Bitmap-Tree Indexing for Set Operations on Free Text Publications Note: Links lead to the DBLP on the Web. Dimitris Dervos Ilias Nitsos , Georgios Evangelidis , Dimitris Dervos: Bitmap-Tree Indexing for Set Operations on Free Text. ICDE 2004 : 837 1 [ 1 ] 2 [ 1 ] ©2005 Association for Computing Machinery