Fernández Jiménez M Ángel, Mena Rodríguez E, Tójar Hurtado JC. Tutoring functions in e-learning: mixed study of the roles of the online tutor. Rev. invest. educ. [Internet]. 2017 Jul. 7 [cited 2026 Sep. 14];35(2):409-26. Available from: https://revistas.um.es/rie/article/view/273271