Weinstein, Alexander. <br/><br/>
Methods of intermediate problems for Eigenvalues  : theory and ramifications 

 - New York :  Academic Press,  1972 
 - 236 p. 
 - Mathematics in science and engineering  ; 89 .
 - Mathematics in science and engineering  ; 89 .
<br/><br/><label>LCCN: </label>53351 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cálculo de variaciones.
<br/><br/><label>Dewey Class. No.: </label>517.4  / W4