DUC ANH, Tran. RANK OF THE DERIVATIVE OF THE PROJECTION TO SYMMETRIZED POLYDISC. HNUE Journal of Science: Natural Sciences, [S. l.], v. 69, n. 2, p. 17–24, 2024. DOI: 10.18173/2354-1059.2024-0016. Disponível em: https://hnuejs.edu.vn/ns/article/view/53.. Acesso em: 21 nov. 2024.