Conditions for existence of an optimal control for some classes of differential equations on time scales. Neliniini Kolyvannya, [S. l.], v. 19, n. 1, p. 67–84, 2016. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/812. Acesso em: 21 jan. 2026.