ASSMER AL – HAYANE, M.; M. DAWOOD AL- BANA, K.; H. AHMED AL-SOWEDI, A. “ The Transfer of the effect of vertical and inverted vertical learning by using learning tools in learning the skill of sstrike in Volley Ball. Al-Rafidain Journal For Sport Sciences, [S. l.], v. 14, n. 48, p. 115–128, 2008. DOI: 10.33899/rajsport.2008.50028. Disponível em: https://rsprs.uomosul.edu.iq/index.php/rsprs/article/view/50219. Acesso em: 2 oct. 2025.