Pérez-Lambert, T., L. García-Leyva, A. Fernández-Salazar, R. Pérez-Matos, and F. Madrid-Estrada. “Educational Tasks of Chemistry: Their List in the Formation of Values Ethical-Professionals in the Students”. Revista Cubana De Química, vol. 33, no. 2, Apr. 2021, pp. 179-97, https://cubanaquimica.uo.edu.cu/index.php/cq/article/view/5182.