Salazar Gómez, J. F., and E. Dolores Ruíz. “Use of an App to Support the Learning of Fractional Operations in Elementary School Students During the COVID-19 Pandemic”. RECI Revista Iberoamericana De Las Ciencias Computacionales E Informática, Vol. 11, no. 22, Dec. 2022, pp. 1 - 12, doi:10.23913/reci.v11i22.109.