Mendoza, H.J.G. and Delgado, O.T. 2018. The contribution of teaching problem solving of Majmutov in formation by stages of mental actions of Galperin. Obutchénie. Revista de Didática e Psicologia Pedagógica. 1, 4 (May 2018), 166–192. DOI:https://doi.org/10.14393/OBv2n1a2018-8.