Karpeshina, Y.E <br/><br/>
Perturbation theory for the schrodinger operator with a periodic potential 
Y.E. Karpeshina 
 - Berlin  Springer  1997 
 - vii  352 
 - Lecture notes in mathematics 1663 .
<br/><br/><label>ISBN: </label>9783540631361 
<br/><br/><label>Dewey Class. No.: </label>4.04+10.04  / KARP