Introduction to Mantra - Stockhausen, Karlheinz 1928-2007 (Kürten Stockhausen Verlag, 2003)
Karlheinz Stockhausen: Introduction to MANTRA( 16 pages in English with numerous musical exampleand a postcard with the MANTRA formula in colour )
Lecture given at the municipal auditorium in Gütersloh, 10 March 1991