Correa Correa DA, Grisales Cardona WE, Montaño Arias WM. Miguel de Unamuno San Manuel Bueno, martyr. History of the coal faith. ReUNAC [Internet]. 2019 Jan. 15 [cited 2026 May 4];11(21):14-20. Available from: https://revistas.unac.edu.co/index.php/unaciencia/article/view/194