TALEBI, Roohollah; REZA TAHERI, Hamid; SOHRABI, Mahdi. Index of difficulty which is an Effective Factor on especial Skill Formation in Basketball Free Throw: Index of learning difficulty hypothesis. Revista Publicando, "Quito, EC", v. 5, n. 16 (2), p. 50–62, 2018. Disponível em: https://revistapublicando.org/revista/index.php/crv/article/view/1647. Acesso em: 22 jan. 2025.