WASET
    Verónica Díaz,  Problem Solving in Chilean Higher Education: Figurations Prior in Interpretations of Cartesian Graphs.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 122(2). 384 - 392
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/10006361.