A.S. Luchins & E.H. Luchins: Isomorphism in Gestalt theory: Comparison of Wertheimer's and Koehler's concepts; by Abraham S. Luchins and Edith H. Luchins (1999)
Introduction to Wolfgang Kohler: Mentality of Apes: Excerpted from Wolfgang's Kohler's book The Mentality of Apes (1925).
Kohler's objections to Thorndike's Puzzle Box approach: Excerpted from Wolfgang's Kohler's book The Mentality of Apes (1925).
Kohler's Work on Insight Learning: brief excerpt on Kohler's research from the book: The Animal Mind by J.L Gould & C. G. Gould
Wolfgang Köhler: Short bio and suggestions for further information.
Wolfgang Köhler: (1929): An old pseudoproblem: Wolfgang Kohler, one of the founders of Gestalt psychology, explicates the epistemological position of Gestalt psychology in this article.