García-Céspedes, D., L. A. Lima-Cazorla, L. Ruiz-Gutierrez, J. L. Santana-Romero, and P. A. Calderón-Peñalver. “Agroecosystems With Probable Health Risks Due to Heavy Metal Contamination”. Revista Cubana De Química, vol. 28, no. 1, May 2016, pp. 378-93, https://cubanaquimica.uo.edu.cu/index.php/cq/article/view/689.