Marion Wolf, Franz Marc. (1974). Biblia Omnii: Timeliness and Timelessness in the Work of Franz Marc. Art Journal, 33(3), lk 226. Kättesaadav: https://www.jstor.org/stable/775786
Edith Hoffmann. (1955). A Franz Marc Exhibition. The Burlington Magazine, 97(627), lk 183. Kättesaadav: http://www.jstor.org/stable/871637