Witts, Dick. “Review of Urs Peter Schneider”. Contact: A Journal for Contemporary Music (1971-1990), no. 19 (June 1, 1978). Accessed August 3, 2025. https://gold-ojs-prod.gold-eprints.cdl.cosector.com/index.php/contactjournal/article/view/contactjournal19_p22-26.