F. Hamad, D. Diaa, and T. Gafel, “Comparing Logistic Support and Race Organization and their Effect on Psychological Toughness of National Center for Gifted in Sports Players and League Club players”, jope, vol. 35, no. 2, pp. 450–457, Jun. 2023, doi: 10.37359/JOPE.V35(2)2023.1403.