Asim Ameer Fadhil, and Ukla Sulaiman Al-houry. “The Effectiveness of a Psychological-Sports Program to Reduce Aggression, Anger and Stubbornness Among Primary School Students”. Modern Sport, vol. 20, no. 1, Mar. 2021, pp. 0143-57, https://doi.org/10.54702/msj.2021.20.1.0143.