Electron-impact excitation cross sections for allowed transitions in atoms.  [electronic resource] 

 -  Physical review. A, Atomic, molecular, and optical physics  Apr 1996 
 - 2425-2432 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1050-2947 
<br/><br/><label>Standard No.: </label>10.1103/physreva.53.2425  doi