Esposito, R <br/><br/>
Morphine lowering of self-stimulation thresholds: lack of tolerance with long-term administration.  [electronic resource] 

 -  Science (New York, N.Y.)  Jan 1977 
 - 189-91 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. 
<br/><br/><label>ISSN: </label>0036-8075 
<br/><br/><label>Standard No.: </label>10.1126/science.831268  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Dose-Response Relationship, Drug<br/>Drug Tolerance<br/>Male<br/>Morphine--administration & dosage<br/>Rats<br/>Self Stimulation--drug effects<br/>Time Factors