غفور ت. و. “A Comparative Study of The Explosive Muscular Power Strength of The Two Legs: Reaction Speed and Accuracy Between Front and Back Crushing Skill in Volleyball”. Koya University Journal of Humanities and Social Sciences, vol. 4, no. 2, Jan. 2022, pp. 211-9, doi:10.14500/kujhss.v4n2y2021.pp211-219.