books.google.com.br - How is language acquired when infants are exposed to multiple language input from birth and when adults are required to learn a second language after early childhood? How do adult bilinguals comprehend and produce words and sentences when their two languages are potentially always active and in competition...https://books.google.com.br/books/about/Handbook_of_Bilingualism.html?hl=pt-BR&id=bBtoRJ2ftOgC&utm_source=gb-gplus-shareHandbook of Bilingualism