volume editor: Helmut Günzler ; 1. -- 5th, completely rev. ed. -- VCH Verlagsgesellschaft, c1994. -- (Ullmann's Encyclopedia of industrial chemistry / executive editor, Wolfgang Gerhartz ; senior editor, Y. Stephen Yamamoto ; editors, F. Thomas Campbell, Rudolf Pfefferkorn, James F. Rounsaville ; vol. B5).