Yan-Qian, Ye <br/><br/>
Theory of limit cycles 

 - Providence  American Mathematical Society  1986 
 - xi, 435p., 22 cm. 
 - Translations of mathematical monographs .
<br/><br/><label>ISBN: </label>0821845187 
<br/><br/><label>Dewey Class. No.: </label>515.35,  / DD, Yan