VAN-KIEN; HA, K.-L.; TRAN, D.-T.; HOANG, N.-Y. On the second Hilbert coefficients and Cohen-Macaulay rings. HPU2 Journal of Science: Natural Sciences and Technology, [S. l.], v. 2, n. 2, p. 3–10, 2023. DOI: 10.56764/hpu2.jos.2023.2.2.3-10. Disponível em: https://sj.hpu2.edu.vn/index.php/journal/article/view/196. Acesso em: 22 nov. 2024.