Wolf, Marion (1974). "Biblia omnii: Timeliness and Timelessness in the Work of Franz Marc". Art Journal. 33 (3): 226–30. doi:10.1080/00043249.1974.10793218.
Levine, Frederick S. (1976). "Iconography of Franz Marc's Fate of the Animals". Art Bulletin. 58 (6): 269–77. doi:10.1080/00043079.1976.10787279.