Elsgolts, L. <br/><br/>
Differential equations and the calculus of variations 
[by] L. Elsgolts. Translated from the Russian by George Yankovsky. 
 - Moscow,  Mir Publishers,  1970. 
 - 440 p. with diagrs. 
<br/><br/> Translation of Different͡s︡ialʹnye uravnenii͡a︡ i variat͡s︡ionnoe ischislenie. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.<br/>Calculus of variations.
<br/><br/><label>Universal Decimal Class. No.: </label>517.97  / ELS