The X-tree: An Index Structure for High-Dimensional Data Permission to copy without fee all or part of this material is granted provided that the copies are not made or distributed for direct commercial advantage, the VLDB copyright notice and the title of the publication and its date appear, and notice is given that copying is by permission of the Very Large Data Base Endowment. To copy otherwise, or to republish, requires a fee and/or special permission from the Endowment. Stefan Berchtold , Daniel A. Keim , Hans‐Peter Kriegel 2002 Elsevier eBooks 1127 citations