Feliciano Marques, Tayse, et al. “The Emergence of the Liquid Consonant L in a child’s Speech: A Longitudinal Study”. MATRAGA - Journal Published by the Graduate Program in Letters at Rio De Janeiro State University (UERJ), vol. 24, no. 41, Aug. 2017, pp. 365-92, doi:10.12957/matraga.2017.28509.