Hernández Padilla, L. del C. ., and L. J. . Romero Álvarez. “Theoretical Contrastation of Procedimental, Attitudinal and Cognitive Aspects in the Teaching and Learning of Statistics”. REVISTA EDUSER, vol. 6, no. 1, Apr. 2019, pp. 10-21, doi:10.18050/RevEduser.v6n1a2.