Cowden, Robert H. (March 1974). "Acting and Directing in the Lyric Theater: An Annotated Checklist". Notes. 30 (3): 449–459. doi:10.2307/896968. JSTOR896968.
Giger, Andreas (December 1997). "Tradition in Post World-War-I Vienna: The Role of the Vienna State Opera from 1919–1924". International Review of the Aesthetics and Sociology of Music. 28 (2): 189–211. doi:10.2307/3108449. JSTOR3108449.
jstor.org
Cowden, Robert H. (March 1974). "Acting and Directing in the Lyric Theater: An Annotated Checklist". Notes. 30 (3): 449–459. doi:10.2307/896968. JSTOR896968.
Giger, Andreas (December 1997). "Tradition in Post World-War-I Vienna: The Role of the Vienna State Opera from 1919–1924". International Review of the Aesthetics and Sociology of Music. 28 (2): 189–211. doi:10.2307/3108449. JSTOR3108449.