Bill Powers
The Method of Levels: a Cognitive-Therapy synthesis
William T. Powers (2010)
Other
Journal on Perceptual Control Theory Vol1 No 1, 1999
SCICOS – A dynamic system builder and simulator Wolfgang Zocher
Books
Doing Research on Purpose
Richard S. Marken (2014) The core of the book are six papers by Dr. Richard S. Marken which have been published in peer reviewed journals over the past decade explaining why Perceptual Control Theory (PCT) […]