ディック・ケット
Lock, S., Last, J. M., & Dunea, G. (2001). The Oxford illustrated companion to medicine. Oxford: Oxford University Press. ISBN 0-19-262950-6
Schmied, Wieland (1978). Neue Sachlichkeit and German Realism of the Twenties. London: Arts Council of Great Britain. ISBN 0-7287-0184-7