Costa David G <br/><br/>
Invitation to variational methods in differential equations. 
Costa David G 
 - Boston  Birkhauser         2007 
 - viii,138p.  cm. 
<br/><br/><label>Standard No.: </label>3492 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential Equations
<br/><br/><label>Dewey Class. No.: </label>B33, P7