juda sawsan, Al-Zuhairi N. The effect of the four-pillar strategy on the performance of the transmission and preparation skills in volleyball. jope [Internet]. 2025 Mar. 28 [cited 2026 Jun. 30];37(1):53-66. Available from: https://www.jcope.uobaghdad.edu.iq/index.php/jcope/article/view/2247