Gallardo Bonilla, Mario Alberto, and Abraham Moctezuma Franco. “Case-Problem: English Learning Based on Competencies; Realities and Perspectives from Abroad”. EDUTECH REVIEW. International Education Technologies Review Revista Internacional De Tecnologías Educativas, vol. 8, no. 1, Feb. 2021, pp. pp. 1-14, doi:10.37467/gka-revedutech.v8.2580.