Andrianto, Rico Eko, and Taufiq Subhanul Qodr. “Improving Critical Thinking and Problem-Solving Skills Through PBL: Evidence from Secondary Education”. Journal on Smart Learning Technologies , vol. 1, no. 1, July 2025, pp. 1-13, https://journal.unesa.ac.id/index.php/jslt/article/view/42727.