Arnold, J M <br/><br/>
A critique of fixed and progressive ratio schedules used to examine the neural substrates of drug reinforcement.  [electronic resource] 

 -  Pharmacology, biochemistry, and behavior  Jul 1997 
 - 441-7 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Review 
<br/><br/><label>ISSN: </label>0091-3057 
<br/><br/><label>Standard No.: </label>10.1016/s0091-3057(96)00445-5  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Cocaine--pharmacology<br/>Dose-Response Relationship, Drug<br/>Heroin--pharmacology<br/>Nucleus Accumbens--drug effects<br/>Reinforcement, Psychology<br/>Self Administration