Max

• A.S. Luchins & E.H. Luchins: Isomorphism in Gestalt theory - Full text article comparing Max Wertheimer's and Wolfgang Koehler's concepts of isomorphism in perception.
• Max Wertheimer on Perceptual Grouping - Adapted by Charles F. Schmidt from Max Wertheimer, Untersuchungen zur Lehre von der Gestalt, II. Psychologishe Forshung, 1923, 4,301-305.
• Max Wertheimer Page - About life and work of Gestalt psychology founder Max Wertheimer, including bibliography and Wertheimer web resources.
• Wertheimer on organizing principles of perceptual grouping - by Charles F. Schmidt