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- Johnson, Julius. 2006. "Anton Webern, the Social Democratic Kunstelle and Musical Modernism." Austrian Studies 14:197–213. (en)
- Viertel, Salka. 1969. The Kindness of Strangers. New York: Holt, Rinehart, and Winston. First edition. . (en)
- Shreffler, Anne C. 1994. Webern and the Lyric Impulse: Songs and Fragments on Poems of Georg Trakl. Oxford: Oxford University Press. . (en)
- Krenek, Ernst. 1998. Im Atem der Zeit: Erinnerungen an die Moderne, trans. Friedrich Saathen and Sabine Schulte. Hamburg: Hoffmann und Campe. . (en)
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