Di Paola, B., and G. Zanniello. “Research in Multicultural Educational Context With Chinese Students: The Chinese Written Language As a Bridge to a Informal Beginning of the Algebraic-Relational Thought”. ITALIAN JOURNAL OF EDUCATIONAL RESEARCH, no. 19, Feb. 2018, pp. 121-38, https://ojs.pensamultimedia.it/index.php/sird/article/view/2549.