LÊ , Văn Chua. SUBGROUPS OF THE MULTIPLICATIVE GROUP OF THE DIVISION RING OF REAL QUATERNIONS. HCMUE Journal of Science, [S. l.], v. 16, n. 12, p. 975, 2019. DOI: 10.54607/hcmue.js.16.12.2560(2019). Disponível em: https://journal.hcmue.edu.vn/index.php/hcmuejos/article/view/2560. Acesso em: 13 jul. 2025.