De Vries, Taco J Cannabinoid modulation of the reinforcing and motivational properties of heroin and heroin-associated cues in rats. [electronic resource] - Psychopharmacology Jul 2003 - 164-169 p. digital Publication Type: Journal Article ISSN: 0033-3158 Standard No.: 10.1007/s00213-003-1422-1 doi Subjects--Topical Terms: AnimalsBehavior, Addictive--chemically inducedCannabinoids--pharmacologyCuesDose-Response Relationship, DrugHeroin--administration & dosageMaleMotivationRatsRats, WistarReceptor, Cannabinoid, CB1--agonistsReinforcement, PsychologySelf Administration