Birman, M.S <br/><br/>
Spectral theory of self-adjoint operators in Hilbert space   
by M S Birman and M Z Solomjak 
 - Dordrecht  D. Reidel Pub. Company  1987 
 - xiii, 301p 
 - Mathematics and its applications (Soviet series) .
<br/><br/><label>ISBN: </label>9027721793 
<br/><br/><label>Dewey Class. No.: </label>515.7246  / N87