Fernandes, J.A., Ferreira Correia, P. and Roa Guzmán, R. (2010) “ACQUISITION OF COMBINATORIAL OPERATIONS BY PRE-UNIVERSITY STUDENTS BY MEANS OF A TEACHING INTERVENTION”, Revista Latinoamericana de Investigación en Matemática Educativa, 13(2), pp. 215–242. Available at: https://www.relime.org/index.php/relime/article/view/319 (Accessed: 23 October 2026).