FATTORINI, H. O. Regular and Strongly Regular Time and Norm Optimal Controls. CUBO, A Mathematical Journal, [S. l.], v. 10, n. 1, p. 77–92, 2008. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1527. Acesso em: 7 dec. 2025.