Yahya, Z., زهير, K. A. Al-Khateeb, and خالد. “Attention Concentration and Perception (senso-motor),and Its Relationship With Long "serve Accuracy in Volleyball”. Al-Rafidain Journal For Sport Sciences (RJSS), vol. 12, no. 41, June 2025, pp. 60-78, doi:10.33899/rajsport.2006.6159.