Chichekian, Tanya, and Bruce M. Shore. “Concept Maps Provide a Window onto Preservice Elementary Teachers’ Knowledge in the Teaching and Learning of Mathematics”. Canadian Journal of Education Revue Canadienne De l’éducation, vol. 36, no. 3, May 2014, pp. 47-71, https://journals.sfu.ca/cje/index.php/cje-rce/article/view/1542.