2021, Cover No. 2. Cover, Vol. 58. No. 2, 2021. <b>Vietnam Journal of Science and Technology</b>, Hanoi, VN, v. 59, n. 2, 2021. DOI: 10.15625/2525-2518/59/2/16034. Disponível em: https://vjs.ac.vn/jst/article/view/16034. Acesso em: 11 jan. 2026.