title: the tv-tree : an index structure for high-dimensional data. authors: king-ip lin , h. v. jagadish , christos faloutsos. venue: vldb j.. year: 1994
title: the a-tree : an index structure for high-dimensional spaces using relative approximation. authors: yasushi sakurai , masatoshi yoshikawa , shunsuke uemura , haruhiko kojima. venue: very large data bases. year: 2000