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

Linking Gestalt-Laws and Cortical Synchronization
by Winfried A. Fellenz, King's College, Dpt. of Mathematics, Strand, London

Rudolf Arnheim: Entropy and Art (1971)
An Essay on Gestalt psychological views on disorder and order.

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

In Search of the Laws of Visual Grouping
From Michael Kubovy Perception Lab

Gestalt Laws
Perception course in the Department of Psychology at the University of Toronto

Embedding Gestalt Laws in the Markov Random Fields
Paper by Song Chun Zhu: a theory for shape modeling and perceptual organization.