Nemytskii, V. V.  <br/><br/>
Qualitative theory of diferential equations 

 - New York :   Dover,   1989. 
 - 522 p. 
<br/><br/><label>ISBN: </label>0486659542 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECUACIONES DIFERENCIALES
<br/><br/><label>Universal Decimal Class. No.: </label>517.9