Bustos, J., F. Vignolo, and G. . Vyhmeister. “A Study on Auditory Perception of Tense and Lax Vowels of English As a FL by Learners With Spanish As L1”. Teaching English As a Foreign Language Journal, vol. 2, no. 2, Sept. 2023, pp. 138-45, doi:10.12928/tefl.v2i2.498.