Adaptive Geometrically Balanced Clustering of H-Matrices.

Lars Grasedyck Wolfgang Hackbusch Sabine Le Borne Adaptive Geometrically Balanced Clustering of H-Matrices. 1-23 2004 73 Computing 1 http://www.springerlink.com/index/10.1007/s00607-004-0068-0 db/journals/computing/computing73.html#GrasedyckHB04