@inproceedings { BKK96, title = {The X-Tree: An Index Structure for High--Dimensional Data}, 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}, year = {1996}, author = {Berchtold, Stefan and Keim, Daniel A. and Kriegel, Hans-Peter} }