Vortex-core structure observed with a scanning tunneling microscope.  [electronic resource] 

 -  Physical review letters  May 1990 
 - 2711-2714 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1079-7114 
<br/><br/><label>Standard No.: </label>10.1103/PhysRevLett.64.2711  doi