Partial differential equations and the calculus of varations  V.2 - essays in honor of Ennio De Giorgi 
ed. by F.Colombini, [et al] 
 - Boston  Birkhauser  1989 
 - 1018p. 
 - Progress in Nonlinear Differential Equations and Their Applications  V.1 .
<br/><br/><label>Dewey Class. No.: </label>515.353  / N89.1