Notes on pictures in the Royal Collections : XII - A portrait of Martin Luther as "Junker Jörg" by Lucas Cranach - Cust, Lionel (Universitätsbibliothek Heidelberg, 1909)
Wissenschaftl. Aufsatz. - Aus: Burlington magazine for connoisseurs, 14 (1909), Nr. Oct 08-Mar 09. pp. 206-209