JAVIER AVILA 
                      Y ROSA ISELA RUIZ GARCÍA | 
                   
                  
                    | Referencias | 
                   
                  
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                        5. Ch. O’ Brien, Ch. “Adicción y abuso de sustancias tóxicas”, en Godman y Gilman. Bases Farmacológicas de la Terapéutica. Buenos Aires: Panamericana, 1980. 
                         
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                        9. C. J. Vila. “Protection from Pentobarbital Lethality Mediated by Pavlovian Conditioning”. Pharmacology Biochemistry and Behavior, 32, (1989): pp. 365-366. 
                         
                        10. A. Dickinson y B. Balleine. “Motivational Control of Goal-Directed Action”. Animal Learning & Behavior, 22, (1994): pp. 1–18. 
                         
                        11. L. Hogarth, A. Dickinso, A. Austin, C. Brown y T. Duka. “Attention and Expectation in Human pPredictive Learning: The Role of Uncertainty”. The Quarterly Journal of Experimental Psychology, 61, (2008): pp. 1658-1668. 
                         
                        12. L. Hogarth, A. Dickinson, S. B. Hutton, N. Elbers Y T. Duka. “Drug Expectancy Is Necessary for Stimulus Control of Human Attention, Instrumental Drug-Seeking Behavior and Subjective Pleasure”. Psychopharmacology, 185, (2006): pp. 495–504. | 
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