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In E minor; possibly incomplete
A date in 1940 is written on the score by someone other than the composer.
Adaptation by the composer of his own music
Métamorphoses nocturnes (Nocturnal Metamorphoses)
Schott
Revised in 1958
Incomplete
Arditti Quartet
Presentation by Bianca Ţiplea Temeş [2012-06-23]; article by Alex Ross [2012-06-23]
Kronos Quartet