Silva, M. Helena Gonçalves da, Character, Ideology, and Symbolism in the Plays of Wedekind, Sternheim, Kaiser, Toller, and Brecht, MHRA Texts and Dissertations, 21 (MHRA, 1985)
Subiotto, Arrigo, Bertolt Brecht's Adaptations for the Berliner Ensemble, MHRA Texts and Dissertations, 8 (MHRA, 1975)