FOX, C. Loops, Overtones and Erhard Grosskopf. Contact: A Journal for Contemporary Music (1971-1990), [S. l.], n. 33, 1988. DOI: 10.25602/GOLD.cj.v0i33.1295. Disponível em: https://journals.gold.ac.uk/index.php/contactjournal/article/view/contactjournal33_p6-12. Acesso em: 22 apr. 2024.