Eloirdi, A., K. Mammad, A. Arfaoui, and A. Ahami. “The Commitment: A Determinant Basic Mental Skill in Student’s Performance in Physical Education and Sport”. Pedagogics, Psychology, Medical-Biological Problems of Physical Training and Sports, Vol. 22, no. 5, Sept. 2018, pp. 246-51, doi:10.15561/18189172.2018.0504.