Laski, Elida V., Marina Vasilyeva, e Joanna Schiffman. “Longitudinal Comparison of Montessori Versus Non-Montessori Students’ Place-Value and Arithmetic Knowledge”. Journal of Montessori Research 2, no. 1 (maio 15, 2016): 1–15. Acesso em novembro 3, 2024. https://journals.ku.edu/jmr/article/view/5677.