1. Rescorla RA, Wagner AR . A theory of Pavlovian conditioning: variations in the effectiveness of reinforcement and nonreinforcement. In: Rescorla RA, Wagner AR, Black AH, Prokasy WF (eds). Classical Conditioning II: Current Research and Theory. Appleton-Century-Crofts: New York, NY, 1972, pp 64–99.
2. Sutton RS, Barto AG . Reinforcement Learning: an Introduction (Adaptive Computation and Machine Learning). MIT Press: Cambridge, Massachusetts, 1998.
3. Rothbaum BO, Davis M . Applying learning principles to the treatment of post-trauma reactions. Ann N Y Acad Sci 2003; 1008: 112–121.
4. Pavlov IP . Conditioned reflexes: an investigation of the physiological activity of the cerebral cortex. Oxford University Press: Oxford, 1927.
5. Myers KM, Davis M . Behavioral and neural analysis of extinction. Neuron 2002; 36: 567–584.