RT Journal Article SR Electronic T1 Psychotropic Drugs as Negative Reinforcers JF Pharmacological Reviews JO Pharmacol Rev FD American Society for Pharmacology and Experimental Therapeutics SP 419 OP 428 VO 27 IS 3 A1 Hoffmeister, Friedrich A1 Wuttke, Wolfgang YR 1975 UL http://pharmrev.aspetjournals.org/content/27/3/419.abstract AB