http://www.xs4all.nl/~gaud/biobak/s/stockhak.htm Biography and summaries of various pieces including examination of certain keyboard techniques. http://www.stockhausen.org/ Official site of the Stockhausen Foundation. Chronology of life and work, interview, awards, CD ordering information, and samples of compositions. Includes the Stockhausen-Verlag. Some material in PDF. http://w3.rz-berlin.mpg.de/cmp/stockhausen.html Classical Music Pages biographical essay with study of his influences from The Grove Concise Dictionary of Music. http://www.karadar.net/Dictionary/stockhausen.html Musica Classica Classical Music Dictionary entry with life, important works, and illustrations. http://www.hnh.com/composer/stockhau.htm Brief biography with summary of his instrumental and vocal music and comments on the numbering of his works. http://stevenestrella.com/composers/composerfiles/stockhausenliving.html Biographical data, recommended CDs, books and sheet music, bibliography, and links to biographical essays from Dr. Estrella's Incredibly Abridged Dictionary of Composers.