M. C. Olaya, E. Gualdrón, L. F. Gómez, and D. I. Fernández Umaña, “Language Teaching and Learning with the Blended Learning Methodology: Evaluating a Pilot Experience in Universidad Cooperativa de Colombia”, Rastros rostros, vol. 15, no. 29, Dec. 2013, doi: 10.16925/ra.v15i29.696.