Albeverio, S. and Kurasov, P. <br/><br/>
Singular perturbations of differential operators; solvable Schrodinger type operators   

 - Cambridge  Cambridge University Press  1999 
 - xiv, 492p. 
 - London Mathematical Society lecture note series   271 .
<br/><br/> "Purchased under NBHM grant for the year 1999-2000"   
<br/><br/><label>Dewey Class. No.: </label>515.35  / Al334.SP