Figueiredo, Sandra Andrade De Bastos & Silva, Carlos Fernandes Da. 2009. Cognitive differences in second language learners and the critical period effects. L1-Educational Studies in Language and Literature 9(4). 157–178. (doi:10.17239/L1ESLL-2009.09.04.05) (https://l1research.org/article/view/280) (Accessed December 22, 2024.)