Merzougui, Samir, et al. “A Study of Some Variables Related to Headmasters Trends of Secondary Stages of EL-OUED about the Subject of Physical Education and Sports”. Al-Jamie Journal In Psychological Studies and Educational Sciences, vol. 7, no. 2, Sept. 2022, pp. 728-52, https://journals.univ-msila.dz/index.php/ajpe/article/view/8811.