Reyes-Joa, Hayde, Darvin Ramirez-Guerra, and Lázaro Bueno-Pérez. “The Improvement of the Teaching-Learning Process of Chess of the Category 10-11 Years”. Ciencia y Deporte 5, no. 1 (December 16, 2019): 19 - 31. Accessed August 19, 2021. https://revistas.reduc.edu.cu/index.php/cienciaydeporte/article/view/3309.