出版
M. Osborn, 'Karl Hofer's Wandlung', Vossische Zeitung, Berlin, 10 March 1931.
M. Breuning, 'Current exhibitions (Karl Hofer at the Schaeffer Galleries)', Parnassus, New York, vol. 9, no. 2, p. 35.
'Hofer Enters 4 American Museums', The Art Digest, vol. 11, 15 January 1937, p. 31.
P. Lesley, 'A Landscape by Carl Hofer', Bulletin of the Detroit Institute of Arts, no. 6, March 1939, p. 6.
'Two painters show works', Detroit Free Press, 19 March 1939.
'Hofer Landscape Gift to Museum', The Detroit News, 19 March 1939.
'Hofer and Fuhr Paintings at Art Institute', Municipal Employee, Detroit, April 1939.
'Hofer's Popularity, Begun at Carnegie, Grows', The Art Digest, vol. 13, 1 May 1939, p. 15 (titled 'Still life').
E.P. Richardson, 20th Century Painting, Detroit, 1947, p. 42.
D. Orban, What is art all about?, Sidney, 1975, pp. 12 & 95 (illustrated pl. 10).
展览
Berlin, Galerie Alfred Flechtheim, Karl Hofer, 1931, no. 25
New London, CT, Lyman Allyn Museum, 1932.
Detroit, Institute of Arts, Karl Hofer and Xaver Fuhr, 1939.
New York, Schaeffer Galleries, New York, 1937, no. 23.