Umbanhowar, Paul <br/><br/>
Granular materials: shaken sand--a granular fluid?  [electronic resource] 

 -  Nature  Aug 2003 
 - 886-7 p.  digital 
<br/><br/> Publication Type: Comment; News 
<br/><br/><label>ISSN: </label>1476-4687 
<br/><br/><label>Standard No.: </label>10.1038/424886a  doi