Assessing the initiation of cocaine self-administration in humans during abstinence: effects of dose, alternative reinforcement, and priming.
Donny EC, Bigelow GE, Walsh SL. Assessing the initiation of cocaine self-administration in humans during abstinence: effects of dose, alternative reinforcement, and priming. Psychopharmacology (Berl). 2004 Mar; 172(3):316-23.