Gould, S., <br/><br/>
Variational methods for eigenvalue problems :  an introduction to the Weinstein method of intermediate problems / 

 - 275 páginas. 
 - Mathematical expositions ;  numero 10 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>ESTADISTICA MATEMATICA.
<br/><br/><label>Dewey Class. No.: </label>519.11