HUSNI, Tahseen. Using Smooth and natural Balls and effect in Learning accacy Serve and ground Fore hand, backhand in beginners tennis. Journal of Physical Education, Baghdasd, Iraq., v. 29, n. 2, p. 274–285, 2017. DOI: 10.37359/JOPE.V29(2)2017.167. Disponível em: https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/167.. Acesso em: 8 may. 2024.