Elsgolts.L. <br/><br/>
Different.Equation &Calculus Of Variation.(1973). 

 - 1st Ed. 
 -  MIR Publication  1977 
 - 440p.  22 cm. 
<br/><br/><br/>Text in English 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>MATH
<br/><br/><label>Dewey Class. No.: </label>MATHS-987  / ELS