COVER 2, V. 57 N. 5. Cover 2. Vietnam Journal of Science and Technology, [S. l.], v. 57, n. 5, 2019. DOI: 10.15625/2525-2518/57/5/14475. Disponível em: https://vjs.ac.vn/index.php/jst/article/view/14475. Acesso em: 23 apr. 2024.