El'sgol'ts L E <br/><br/>
Differential equations 

 -  1957 
 - International Monographs on Advanced Mathematics and Physics .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Equations
<br/><br/><label>Dewey Class. No.: </label>B33, J7