Mariño, L.-F., Hernández, R.-V. and Hernández-Suárez, C.-A. (2023) “Problem Solving as Variational Ways of Thinking in Math Teachers in Training”, Saber, Ciencia y Libertad, 18(1), pp. 435–458. doi:10.18041/2382-3240/saber.2023v18n1.10232.