Existence of Minimizers for Nonconvex, Noncoercive Simple Integrals. - P. Celada; Stefania Perrotta (SIAM J. Control. Optim., 2002)

On a Class of Nonconvex Bolza Problems Related to Blatz-Ko Elastic Materials. - P. Celada; Stefania Perrotta (SIAM J. Math. Anal., 2007)