VALDIVIA ALCALÁ, Ramón. Optimal control applied to the economy of mineral resources. REVISTA TERRA LATINOAMERICANA, [S. l.], v. 28, n. 3, p. 265–272, 2010. Disponível em: https://mail.terralatinoamericana.org.mx/index.php/terra/article/view/1233. Acesso em: 19 sep. 2024.