Thomas, John H <br/><br/>
Downward pumping of magnetic flux as the cause of filamentary structures in sunspot penumbrae.  [electronic resource] 

 -  Nature  Nov 2002 
 - 390-3 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0028-0836 
<br/><br/><label>Standard No.: </label>10.1038/nature01174  doi