References
Adolf von Hildebrand
1847-1921
(1913). Das Problem der Form in der bildenden Kunst. Strassburg: Heitz.
(1994). The problem of form in the fine arts. In E. Ikonomou & H. F. Mallgrave (eds.) Empathy, form, and space (pp. 227-280). Santa Monica: Getty Center for the History of Art and Humanities.