Gestalt Laws

A.S. Luchins & E.H. Luchins: Comments on the Concept of Closure :

- Gestalt Archive: Comments on the Concept of Closure by Abraham S. Luchins and Edith H. Luchins
On Perceptual Grouping :

- Adapted from Max Wertheimer, Untersuchungen zur Lehre von der Gestalt, II. Psychologische Forschung, 1923, 4,301-305. By Charles F. Schmidt