1. M. McCloskey and N.J. Cohen, Catastrophic interference in connectionist networks: The sequential learning problem, in The Psychology of Learning and Motivation, Vol. 24. C.H. Bower, Ed. (Academic Press, New York. 1989).
2. R.A Rescorla and A.R Wagner, A theory of Pavlovian conditioning: Variations in the effectiveness of reinforcement and non reinforcement, in Classical Conditioning II Current Research and Theory, A.H. Black and W.F. Prokasy, Eds. (Appleton-Century-Crofts, New York, 1972). The model actually predicts incomplete unlearning if background cues become inhibitory in extinction. This possibility has not been confirmed; see, e.g., M.E. Bouton and D.A. King, Contextual control of the extinction of conditioned fear: Tests for the associative value of the context, Journal of Experimental Psychology: Animal Behavior Processes, 9, 248-265 (1983)
3. For a review, see M.E. Bouton, Context and retrieval in extinction and in other examples of interference in simple associative learning, in Current Topics in Animal Learning: Brain, Emotion, and Cognition, L. Dachowski and C.F. Flaherty, Eds. (Erlbaum, Hillsdale, NJ, 1991).