Lecture V: Four criteria of Electronic music (Kontakte) and Questions and answers on four criteria of electronic music - Stockhausen, Karlheinz 1928-2007 (Kürten Stockhausen Verlag, 2010)
Lecture V: Four Criteria of Electronic Music ( KONTAKTE ) and Questions and Answers on Four Criteriaof Electronic Music given at the Oxford Union on May 6th 1972