Santos, Natanael Antonio dos, Valtenice de Cássia Rodrigues de Matos França, and Éllen Dias Nicácio da Cruz. “ Perception of Concentric Patterns in Children of 8 to 13 Years Old ”. Paidéia (Ribeirão Preto) 17, no. 37 (August 1, 2007): 255–264. Accessed June 19, 2024. https://revistas.usp.br/paideia/article/view/6434.