Vas, J. Ángel C., Andrade, M. G. M., Masa, J. A. and Vasco, y J. R. M. (2017) “USE OF A JUST IN TIME TEACHING / FLIPPED CLASSROOM QUESTIONNAIRE FOR THE DETECTION OF IMPROVEMENTS IN UNIVERSITY EDUCATIONAL MATERIALS”, IJRDO- Journal of Educational Research, 2(3), pp. 142-161. doi: 10.53555/er.v2i3.159.