Quadros-Flores, Paula Maria, Daniela Mascarenhas, and Manuela Machado. “The Polya Method and Gamification As Strategies in Problem Solving”. Diario de Practicum 5, no. 2 (December 18, 2020): 47–64. Accessed May 17, 2024. https://www.revistas.uma.es/index.php/iop/article/view/10227.