Palta Valladares NI, Sigüenza Orellana JP, Pulla Merchán JF. Problem-Based Learning as a didactic strategy in the teaching process. Social [Internet]. 2018 July 2 [cited 2026 Nov. 7];2(2):1-8. Available from: https://killkana.ucacue.edu.ec/index.php/killkana_social/article/view/291