Boyens, P., Henneman, I., & Hoozee, R. (1990). Vlaams expressionisme in Europese context 1900-1930. Gent: Snoeck-Ducaju.
Lua i Stíl Chicago (17ú heag.)Boyens, Piet, Inge Henneman, agus Robert Hoozee. Vlaams Expressionisme in Europese Context 1900-1930. Gent: Snoeck-Ducaju, 1990.
Lua MLA (8ú heag.)Boyens, Piet, et al. Vlaams Expressionisme in Europese Context 1900-1930. Gent: Snoeck-Ducaju, 1990.
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