Elsgolts  <br/><br/>
Differential Equations & the Calculus of Variations 

 - Moscow  Mir  Publishers  1973 
 - 440 
<br/><br/><br/>ENGLISH 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>Equations
<br/><br/><label>Dewey Class. No.: </label>515