FRIEND, H. C. Review of 1972/01/17 Concert at The Roundhouse, London. BBC Symphony Orchestra, conducted by Pierre Boulez. Contact: A Journal for Contemporary Music (1971-1990), [S. l.], n. 4, 1972. DOI: 10.25602/GOLD.cj.v0i4.887. Disponível em: https://journals.gold.ac.uk/index.php/contactjournal/article/view/contactjournal04_p25-27. Acesso em: 3 may. 2024.