Segura de Herrero, Sandra Mabel. “LINEAR EQUATIONS SYSTEMS A DIDACTIC SEQUENCE ”. Revista Latinoamericana de Investigación en Matemática Educativa 7, no. 1 (March 31, 2004): 49–78. Accessed October 23, 2026. https://www.relime.org/index.php/relime/article/view/542.