Bronna Levy

Bilingual signed and spoken language acquisition from birth: implications for the mechanisms underlying early bilingual language acquisition

L. Petitto, B. Levy, V. Ferraro, 2001, Journal of Child Language.

Baby hands that move to the rhythm of language: hearing babies acquiring sign languages babble silently on the hands

D. Ostry, L. Sergio, L. Petitto, 2004, Cognition.