OLANIYI, Oladimeji. Mispronunciation of English back vowels among secondary school and undergraduate students in Lokoja, Kogi state, Nigeria. Journal of Second and Multiple Language Acquisition-JSMULA, [S. l.], p. 446–467, 2024. DOI: 10.5281/zenodo.10558080. Disponível em: https://www.science-res.com/index.php/jsmula/article/view/156. Acesso em: 24 apr. 2026.