“Formalization of the perception of the nasalized low vowel in Spanish in the light of the BiPhon model: a comparative study of grammar fragments of Spanish native speakers and Brazilian students learning Spanish as a foreign language”, Rev. Est. Ling., vol. 29, no. 1, pp. 13–48, Oct. 2024, doi: 10.17851/2237-2083.29.1.13-48.