Roubicek, T <br/><br/>
Relaxation in optimization theory & variational calculus 
T. Roubicek 
 - Berlin  Walter de Gruyter  1997 
 - xiv  474 
 - De gruyter series in nonlinear analysis & applications 4 .
<br/><br/><label>ISBN: </label>3-11-014542-1 
<br/><br/><label>Dewey Class. No.: </label>515.3  / ROU