Robbins, T W The acquisition of responding with conditioned reinforcement: effects of pipradrol, methylphenidate, d-amphetamine, and nomifensine. [electronic resource] - Psychopharmacology Jun 1978 - 79-87 p. digital Publication Type: Journal Article ISSN: 0033-3158 Standard No.: 10.1007/BF00426794 doi Subjects--Topical Terms: AnimalsConditioning, Operant--drug effectsDextroamphetamine--pharmacologyIsoquinolines--pharmacologyLearning--drug effectsMaleMethylphenidate--pharmacologyNomifensine--pharmacologyPiperidines--pharmacologyRatsRats, Inbred StrainsReinforcement, Psychology