Nemytskii, V.V. <br/><br/>
Qualitative theory of differential equations   
by V.V. Nemytskii, V.V.Stepanov, tr. by Solomon Lefschetz 
 - New Jersey  Princeton University Press  1960 
 - viii, 523p. 
 - Princeton mathematical series .
<br/><br/><label>LCCN: </label>60-12240 
<br/><br/><label>Dewey Class. No.: </label>515.35  / N60