COVER, NO. 2. 2020, Cover. Cover, No. 2. 2020. <b>Vietnam Journal of Science and Technology</b>, Hanoi, VN, v. 58, n. 2, 2020. DOI: 10.15625/2525-2518/58/2/14974. Disponível em: https://vjs.ac.vn/jst/article/view/14974. Acesso em: 11 jan. 2026.