Yves Klein (English Wikipedia)

Gilbert Perlein & Bruno Corà (eds) & al., Yves Klein: Long Live the Immaterial! ("An anthological retrospective", catalog of an exhibition held in 2000), New York: Delano Greenidge, 2000, ISBN 978-0-929445-08-3, p. 226: "This symphony, 40 minutes in length (in fact 20 minutes followed by 20 minutes of silence) is constituted of a single 'sound' stretched out, deprived of its attack and end which creates a sensation of vertigo, whirling the sensibility outside time."

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Beale, Jason. "Yves Klein, The Void". Jasonbeale.com. Archived from the original on 19 July 2008.

Held Jr., John. "The Formidable Blue Stamp of Yves Klein". Mailartist.com. Archived from the original on 2 November 2012.

"#3: How Questlove Learned to Love Silence". A Piece of Work. NPR. 17 July 2017. Retrieved 28 November 2021.

"Yves Klein". Biography. Archived from the original on 21 March 2019. Retrieved 21 March 2019.
"Yves Klein (1928–1962)". Yves Klein Archives. Archived from the original on 30 May 2013. Retrieved 12 May 2013.
See also at YvesKleinArchives.org a 1998 sound excerpt of Monotone Silence Symphony Archived 8 December 2008 at the Wayback Machine (Flash plugin required), and Klein's "Chelsea Hotel Manifesto" Archived 17 September 2013 at the Wayback Machine (including a summary of the 2-part Symphony).
Held Jr., John. "The Formidable Blue Stamp of Yves Klein". Mailartist.com. Archived from the original on 2 November 2012.
Beale, Jason. "Yves Klein, The Void". Jasonbeale.com. Archived from the original on 19 July 2008.
"An account and sound recording of the 1960 performance". Archived from the original on 21 February 2001. Retrieved 21 February 2001.{{cite web}}: CS1 maint: unfit URL (link).
Yves Klein Archives. "Chelsea Hotel Manifesto". 1961. Archived from the original on 15 January 2013. Retrieved 26 April 2013.

Hannah Weitemeier [de], Yves Klein, 1928–1962: Internacional Klein Blue, translated by Carmen Sánchez Rodríguez (Cologne, Lisbon, Paris: Taschen, 2001), 8. ISBN 3-8228-5842-0.

Gualtiero Jacopetti (Director), Paolo Cavara (Director), Franco Prosperi (Director) (1962). MONDO CANE. Cineriz. Performance by Yves Klein starts at 1:18:34. Retrieved 21 August 2023.

"Yves Klein (1928–1962)". Yves Klein Archives. Archived from the original on 30 May 2013. Retrieved 12 May 2013.
See also at YvesKleinArchives.org a 1998 sound excerpt of Monotone Silence Symphony Archived 8 December 2008 at the Wayback Machine (Flash plugin required), and Klein's "Chelsea Hotel Manifesto" Archived 17 September 2013 at the Wayback Machine (including a summary of the 2-part Symphony).
Yves Klein Archives. "Chelsea Hotel Manifesto". 1961. Archived from the original on 15 January 2013. Retrieved 26 April 2013.