França, Valtenice de Cássia Rodrigues de Matos, and Natanael Antonio dos Santos. 2006. “ The Contrast Sensitivity to Distincts Patterns in Pre-School Children ”. Paidéia (Ribeirão Preto) 16 (34): 225-28. https://doi.org/10.1590/S0103-863X2006000200010.