WAUGH, J.; WAUGH, W. O. Die Reihe in Perspective. Contact: A Journal for Contemporary Music (1971-1990), [S. l.], n. 16, 1977. DOI: 10.25602/GOLD.cj.v0i16.1062. Disponível em: https://journals.gold.ac.uk/index.php/contactjournal/article/view/contactjournal16_p3-7. Acesso em: 24 apr. 2024.