Coles, Alf, and Nathalie Sinclair. “Re-Thinking ‘Normal’ Development in the Early Learning of Number”. Journal of Numerical Cognition 4, no. 1 (June 7, 2018): 136-158. Accessed April 23, 2024. https://jnc.psychopen.eu/index.php/jnc/article/view/5789.