Pericás, Paula, and Mónica Arnal-Palacián. “Outdoor Arithmetic With 5-Year-Olds”. TANGRAM - Revista de Educação Matemática 7, no. 1 (March 30, 2024): 145–157. Accessed July 16, 2024. https://ojs.ufgd.edu.br/tangram/article/view/17793.