García-García, Javier, et al. “The Strategies Used by Children Tee Savi in Solving Arithmetic Problems Tee Savi in Solving Arithmetic Problems”. Revista Latinoamericana de Investigación en Matemática Educativa, vol. 18, no. 2, July 2015, pp. 213-44, https://doi.org/10.12802/relime.13.1823.