Valdivia Moral, P. Ángel, Sánchez Pato, A., Alonso Roque, J. I., & Zagalaz Sánchez, M. L. (2011). Co-educational experiences of physical education teachers in relation with the contents of the subject. Education in The Knowledge Society, 12(2), 300–320. https://doi.org/10.14201/eks.8283