Pontryagin, L.S.. <br/><br/>
Ordinary Defferential Equations /  

 - 1st ed /  
 - Massachusetts :   Addison-Wesley Publishing Company Inc.. 
 - p.298,vi :  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>B331  / K2