Nayfeh, A.H & Mook, D.T <br/><br/>
Nonlinear oscillations 
A.H. Nayfeh & D.T. Mook 
 - New York  John Wiley & Sons  1979 
 - xiv  704 
 - Pure & applied mathematics .
<br/><br/><label>ISBN: </label>0471035556 
<br/><br/><label>Dewey Class. No.: </label>14.10+4.04  / NAYF