Salvaterra, R <br/><br/>
GRB 090423 at a redshift of z approximately 8.1.  [electronic resource] 

 -  Nature  Oct 2009 
 - 1258-60 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. 
<br/><br/><label>ISSN: </label>1476-4687 
<br/><br/><label>Standard No.: </label>10.1038/nature08445  doi