Henrich, Vanessa, and Letícia Pacheco Ribas. 2015. “Atypical Phonologic Acquisition In Brasilian Portuguese: Implicational Relations And Markedness In The Emergence Of Rhotic Consonants”. Letrônica 7 (2):678-94. https://doi.org/10.15448/1984-4301.2014.2.17748.