James M. Ritchie, German Literature under National Socialism (London, 1983), 111-22; Ralf Schnell, Literarische innere Emigration: 1933 — 1945 (Stuttgart, 1976), 113-32, цитата на стр. 121; Peter Barbian, «Literary Policy in the Third Reich», in Cuomo (ed.), National Socialist Cultural Policy, 155-96; Reinhold Grimm, «Im Dickicht der inneren Emigration», in Denkler and Prumm (eds.), Die deutsche Literatur, 406-26.
