Optimality and Duality for Nondifferentiable Multiobjective Variational Problems with Higher Order Derivatives. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 2, n. 3, p. 372–400, 2009. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/180. Acesso em: 22 dec. 2024.