↑ Blatter, Alfred (2007). Revisiting music theory: a guide to the practice, p.28. ISBN 0-415-97440-2.
↑ Castro, Ruy (transl. by Lysa Salsbury). Bossa Nova: The Story of the Brazilian Music That Seduced the World. 2000. 1st English language edition. A Capella Books, an imprint of Chicago Review Press, Inc. ISBN 1-55652-409-9 First published in Brasil by Companhia das Letras (1990)
