Pontriagin, Lev Semenovich <br/><br/>
Ordinary differential equations. Translated from the Russian by Leonas Kacinskas and Walter B. Counts. 

 - Reading, Massachusetts :  Addison-Wesley Publishing Company,  1962 
 - 298 p. 
 - Adiwes international series in mathematics .
<br/><br/><label>Dewey Class. No.: </label>515.32  / P818