Khaoui, A., Sahnoune, A., & Belkheir, A. (2026). The contribution of healthy nutrition to developing pupils’ competence during physical education and sport lessons: A field study in secondary schools of the Ouled Derradj District, M’Sila Province. The International Tax Journal, 53(1), 1–12. Retrieved from https://internationaltaxjournal.online/index.php/itj/article/view/490