Pandey Rakesh Kumar <br/><br/>
Study of discontinuities in energy spectra and perturbation theory 

 -  1989 
 - 146p.  p.  cm. 
<br/><br/><label>Standard No.: </label>72606 
<br/><br/><label>Source: </label> Theses 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PHYSICS