Roohollah, Hamid, Mahdi. Index of difficulty which is an Effective Factor on especial Skill Formation in Basketball Free Throw: Index of learning difficulty hypothesis. Rev. Publicando [Internet]. 9 de octubre de 2018 [citado 27 de abril de 2024];5(16 (2):50-62. Disponible en: https://revistapublicando.org/revista/index.php/crv/article/view/1647