Study on the professional improvement of the teachers of volleyball of the EIDE of Pinar del Rio. Sport and Science, [S. l.], v. 4, n. 1, p. 19–32, 2019. DOI: 10.34982/2223.1773.2019.V4.No1.002. Disponível em: https://cienciaydeporte.reduc.edu.cu/index.php/cienciaydeporte/article/view/95. Acesso em: 31 may. 2026.