Fruchter, A S <br/><br/>
Long gamma-ray bursts and core-collapse supernovae have different environments.  [electronic resource] 

 -  Nature  May 2006 
 - 463-8 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1476-4687 
<br/><br/><label>Standard No.: </label>10.1038/nature04787  doi