@incollection{18660,
author = {Wolfgang Hackbusch and Boris N. Khoromskij},
title = {{Towards $ \mathscr{H} $-matrix approximation of linear complexity}},
series = {Operator theory\,:\,advances and applications},
volume = {121},
booktitle = {Problems and methods in mathematical physics\,:\,the Siegfried PrĂ¶ssdorf memorial
volume\,;\,proceedings of the 11th TMP, Chemnitz, Germany, March 25 - 28, 1999},
editor = {Johannes Elschner and Israel Gohberg and Bernd Silbermann},
publisher = {BirkhĂ¤user},
address = {Basel [u. a.]},
year = {2001},
pages = {194--220},isbn={3-7643-6477-7},
}