^
Hugo Kaufmann . In: Hans Vollmer (ed.): General lexicon of visual artists from antiquity to the present . Founded by Ulrich Thieme and Felix Becker . Volume 20 : Merchant Knight . EA sailor, Leipzig 1927, S. 8-9 .
^00540 Hugo Kaufmann, Matrikelbuch 1884-1920. Volume 3. Academy of Fine Arts Munich , August 6, 2007, accessed on August 11, 2012 .
