Vilasó-Cadre, Javier E., et al. “Some Chemical-Physical Parameters of the Waters of the ‘Lago Azul’ of the Town ‘El Cobre’”. Revista Cubana De Química, vol. 29, no. 3, Oct. 2017, pp. 456-65, https://cubanaquimica.uo.edu.cu/index.php/cq/article/view/2962.