"Troutman,John,L." <br/><br/>
Variational Calculas wit 

 - New York  Springer-Verlag  1983 
 - "xiii,364" 
<br/><br/><label>ISBN: </label>3540907718 
<br/><br/><label>Dewey Class. No.: </label>515  / 64 TRO