Elsgolts L <br/><br/>
Differential equations and the calculus of variations 

 -  1970 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>29827 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations
<br/><br/><label>Dewey Class. No.: </label>B33, L0