ALI HUSSEIN AL-KUFI, Hussein. The effect of a training program on vitamin D levels and some fat-soluble vitamins on tennis players’ performance. Kufa Journal of Physical Education Sciences, Kufa, Najaf, Iraq, v. 3, n. 8, p. 220–234, 2026. Disponível em: https://journal.uokufa.edu.iq/index.php/kjpes/article/view/23599. Acesso em: 6 nov. 2026.