MILLER, David P. The Shapes of Indeterminacy: John Cage’s Variations I and Variations II. European Journal of Musicology, Bern, v. 6, 2003. DOI: 10.5450/ejm.2003.6.6168. Disponível em: https://bop.unibe.ch/EJM/article/view/6168. Acesso em: 31 jan. 2025.