Schiffer, Brigitte. “Review of Texte Zur Musik 1970-1977, Band 4 by Karlheinz Stockhausen, Ed. Christoph Von Blumröder”. Contact: A Journal for Contemporary Music (1971-1990), no. 22 (June 1, 1981). Accessed April 26, 2024. https://journals.gold.ac.uk/index.php/contactjournal/article/view/contactjournal22_p25-26.