ROCKAFELLAR, R. T. Semigroups of convex bifunctions generated by Lagrange problems in the calculus of variations. MATHEMATICA SCANDINAVICA, [S. l.], v. 36, p. 137–158, 1975. DOI: 10.7146/math.scand.a-11568. Disponível em: https://www.mscand.dk/article/view/11568. Acesso em: 8 may. 2024.