Il' Yashenko, Yu S. <br/><br/>
Finiteness theorems for limit cycles  / 

 - Providence:  American Mathematical Society,  1991 
 - ix, 288p. Bibl. 
 - Translations of Mathematical monographs ; 94 .
<br/><br/> "Translated from the Russian by H. H. McFaden" 
<br/><br/><label>Dewey Class. No.: </label>515.35  / Il29.FT