Fucik, Svatopluk., [et al] <br/><br/>
Spectral analysis of nonlinear operators   
by Svatopluk Fucik, [et al] 
 - Berlin  Springer-Verlag  1973 
 - 287p. 
 - Lecture Notes in Mathematics 346 .
<br/><br/><label>ISBN: </label>3540064842 
<br/><br/><label>Dewey Class. No.: </label>515.72  / N732