Gadelha, Maria José Nunes, Joenilton Saturnino Cazé da Silva, Jandilson Avelino da Silva, Michael Jackson de Oliveira Andrade, Débora Najda de Medeiros Viana, and Natanael Antonio dos Santos. 2016. “Effects of Aging on Visual Contrast of Sinusoidal Gratings”. Psico 47 (3):209-15. https://doi.org/10.15448/1980-8623.2016.3.22748.