1. The Behavior of Organisms;Skinner,1938
2. Emotion and Adaptation;Lazarus,1991
3. Emotions conceptualized as intervening variables - with suggestions toward a theory of frustration;Brown;Psychol Bull,1951
4. Conditioned Reflexes. An Inverstigation of the Physiological Activity of the Cerebral Cortex;Pavlov,1927
5. Animal intelligence: an experimental study of the associative processes in animals;Thorndike,1898