Wilheim, András (1977). "The Genesis of a Specific Twelve-Tone System in the Works of Varèse". Studia Musicologica Academiae Scientiarum Hungaricae. T. 19 (Fasc. 1/4): 203–226. doi:10.2307/901798. JSTOR901798.
Wilheim, András (1977). "The Genesis of a Specific Twelve-Tone System in the Works of Varèse". Studia Musicologica Academiae Scientiarum Hungaricae. T. 19 (Fasc. 1/4): 203–226. doi:10.2307/901798. JSTOR901798.
Schrott, Allen; Woodstra, Chris; Brennan, Gerald, eds. (2005). All Music Guide to Classical Music: The Definitive Guide to Classical Music. Chris Woodstra, Gerald Brennan, Allen Schrott. San Francisco, CA: Backbeat Books. p. 1427. ISBN0-87930-865-6. OCLC61295944.