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9. An investigation of nalorphine and perphenazine as negative reinforcers in an escape paradigm. Kandel DA, Schuster CR. Pharmacol Biochem Behav; 1977 Jan; 6(1):61-71. PubMed ID: 403529 [Abstract] [Full Text] [Related]
15. Morphine tolerance and dependence induced by intraventricular injection. Eidelberg E, Barstow CA. Science; 1971 Oct 01; 174(4004):74-6. PubMed ID: 5001035 [Abstract] [Full Text] [Related]