Lara Freire, M.L., Escudero Orozco, G.I., Fuertes López, B.N. y Rojas Yumisaca, W.G. 2019. Grammar video lessons to foster independent learners in the English as a foreign language classroom. Ciencia Digital. 3, 3.1 (jul. 2019), 203-220. DOI:https://doi.org/10.33262/cienciadigital.v3i3.1.689.