Palmas, Santiago, and David Block. “Access to a Written Representation of Natural Numbers: A Didactic Sequence for Adults With Little or No Schooling”. Revista Latinoamericana de Investigación en Matemática Educativa 17, no. 2 (July 13, 2023): 165–189. Accessed October 23, 2026. https://www.relime.org/index.php/relime/article/view/205.