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.