@inproceedings{BKK96,
 author = {Berchtold, Stefan and Keim, Daniel A. and Kriegel, Hans-Peter},
 booktitle = {Proc. 22th Int. Conf. on Very Large Databases (VLDB'96), Bombay, India},
 editor = {Vijayaraman, T. and Buchmann, Alex and Mohan, C. and Sarda, N.},
 pages = {28--39},
 publisher = {Morgan Kaufmann},
 title = {The X-Tree: An Index Structure for High--Dimensional Data},
 year = {1996}
}