JORDAN, D.W. <br/><br/>
Nonlinear Ordinary Differential Equations. 

 - 2nd edi. 
 - Oxford  Oxford University Press.  1992 
 - ix, 381p. 
<br/><br/><label>ISBN: </label>0 19 859656 1 
<br/><br/><label>Dewey Class. No.: </label>515.3'52