Talebi, R., Reza Taheri, H. and Sohrabi, M. (2018) “Index of difficulty which is an Effective Factor on especial Skill Formation in Basketball Free Throw: Index of learning difficulty hypothesis”, Revista Publicando, 5(16 (2), pp. 50–62. Available at: https://revistapublicando.org/revista/index.php/crv/article/view/1647 (Accessed: 22 January 2025).