Ullmann, Johannes <br/><br/>
High precision hyperfine measurements in Bismuth challenge bound-state strong-field QED.  [electronic resource] 

 -  Nature communications  05 2017 
 - 15484 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>2041-1723 
<br/><br/><label>Standard No.: </label>10.1038/ncomms15484  doi