Pérez Miranda, C., V. Callao, y P. Romero. 1970. «The Sulfur of the Soils and Their Possible Influncioa in Tuberculosis and the Repilo of the Olive Trees». Ars Pharmaceutica (Internet) 11 (5-6):241-46. https://revistaseug.ugr.es/index.php/ars/article/view/9711.