System of mathematical problems for the strengthening of the Tributary Culture (Original). REDEL. Revista Granmense de Desarrollo Local, [S. l.], v. 6, n. 1, p. 373–391, 2022. Disponível em: https://revistas.udg.co.cu/index.php/redel/article/view/3066. Acesso em: 28 aug. 2026.