- ^ Squiers, Anthony (2014). An Introduction to the Social and Political Philosophy of Bertolt Brecht: Revolution and Aesthetics. Amsterdam: Rodopi. p. 190. ISBN 9789042038998.
- ^ Introduction to Methuen student edition
- ^ a b Introduction to Penguin Modern Classics version
- ^ Mayakovsky and Brecht himself were both accused of "formalism" in the Soviet Union at times.
- ^ Brough, Neil; Kavanagh, R. J. (1991). "But who is Azdak? The main source of Brecht's Der kaukasische Kreidekreis". Neophilologus. 75: 573–580. doi:10.1007/BF00209897.
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