NO. 4(2021), Contents. Contents: Contents No. 4 (2021). <b>Vietnam Journal of Science and Technology</b>, Hanoi, VN, v. 59, n. 4, p. 525, 2021. Disponível em: https://vjs.ac.vn/jst/article/view/16368. Acesso em: 11 jan. 2026.