B. Lonergan, D. D. Cohen, S. Williams, R. Lawson, D. J. Howarth, and D. M. Johnson, “Inter-Day Reliability of Countermovement Jump Metrics in Elite Academy Soccer Players”, Int’l Journal of Strength & Conditioning, vol. 5, no. 1, Nov. 2025, doi: 10.47206/ijsc.v5i1.504.