Valiyev, Y., S. Aliyev, A. Tagiyev, K. Huseynova, T. Hasanov, and N. Aliyev. “Effects of an 8-Week Physical Education Training Program on Physical Fitness in U17–U18 Students”. Physical Education Theory and Methodology, vol. 26, no. 3, May 2026, pp. 475-81, doi:10.17309/tmfv.2026.3.08.