Burton, T. A. <br/><br/>
Stability and periodic solutions of ordinary and functional differential equations   

 - New York  Academic Press  1985 
 - x, 337p. Index 
 - Mathematics in Science and Engineering   v. 178 .
<br/><br/>  
<br/><br/><label>Dewey Class. No.: </label>515.35  / B974.SP