In their book In Other Words, Ellen Bialystok and Kenji Hakuta, both professors studying bilingualism, examined the idea that "the knowledge of two languages is greater than the sum of its parts."
No seu libro Noutras verbas" (In Other Words), Ellen Bialystok e Kenji Hakuta examinan a idea de que "o coñecemento de dúas linguas é maior que a suma das súas partes."