Pontriagin, L S <br/><br/>
Course in ordinary differential equations 

 - Delhi:   Hindustan Publishing Corporation (India),    1967 
 - 333p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Universal Decimal Class. No.: </label>517.9(075.8)  / K7