Lenzen, Benoît, Bernard Poussin, Hervé Dénervaud, and Adrián Cordoba. “Curricular References of Physical Education Teachers: Influence of Seniority”. Swiss Journal of Educational Research 34, no. 1 (October 3, 2018): 139–168. Accessed May 18, 2022. https://sjer.ch/article/view/4879.