1.
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. RJSS [Internet]. 2008 Jul. 1 [cited 2025 Oct. 2];14(48):115-28. Available from: https://rsprs.uomosul.edu.iq/index.php/rsprs/article/view/50219