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

 -  1967 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>22794 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B331, K71;1