Nayfeh, Alihasen. <br/><br/>
Nonlinear oscillations   
by Alihasen Nayfeh and Dean T. Mook. 
 - New York  John Wiley and sons  1979 
 - xiv, 702p    incl. bibl., ind. 
 - Pure and applied mathematics .
<br/><br/><label>ISBN: </label>0471035556 
<br/><br/><label>Dewey Class. No.: </label>531  / N79