TOOP, R. On Writing About Stockhausen. Contact: A Journal for Contemporary Music (1971-1990), [S. l.], n. 20, 1979. DOI: 10.25602/GOLD.cj.v0i20.1134. Disponível em: https://journals.gold.ac.uk/index.php/contactjournal/article/view/contactjournal20_p25-27. Acesso em: 3 mar. 2024.