FOX, C. Walter Zimmermann’s Local Experiments. Contact: A Journal for Contemporary Music (1971-1990), [S. l.], n. 27, 1983. DOI: 10.25602/GOLD.cj.v0i27.1233. Disponível em: https://journals.gold.ac.uk/index.php/contactjournal/article/view/contactjournal27_p4-9. Acesso em: 23 apr. 2024.