An optimal control problem for a Poisson equation with nonlocal boundary-value conditions. Neliniini Kolyvannya, [S. l.], v. 16, n. 3, p. 350–358, 2013. Disponível em: https://nosc.imath.kiev.ua/index.php/nosc/article/view/703. Acesso em: 12 apr. 2026.