Variational Formulation with Deviating Arguments of Movable boundaries. Baghdad Science Journal, Iraq, Baghdad, v. 1, n. 1, p. 161–165, 2004. Disponível em: https://bsj-ojs.uobaghdad.edu.iq/index.php/BSJ/article/view/519.. Acesso em: 19 jun. 2025.