Cocaine- and food-maintained responding under a multiple schedule in rhesus monkeys: environmental context and the effects of a dopamine antagonist.
Nader MA, Sinnott RS, Mach RH, Morgan D. Cocaine- and food-maintained responding under a multiple schedule in rhesus monkeys: environmental context and the effects of a dopamine antagonist. Psychopharmacology (Berl). 2002 Oct; 163(3-4):292-301.