Toop, Richard. “Stockhausen’s Klavierstück VIII”. Contact: A Journal for Contemporary Music (1971-1990), no. 28 (September 1, 1984). Accessed August 4, 2025. https://gold-ojs-prod.gold-eprints.cdl.cosector.com/index.php/contactjournal/article/view/contactjournal28_p4-19.