On the Kernel of the Borel’s Characteristic Map of Lie Groups. Communications in Mathematical Research, [S. l.], v. 39, n. 2, p. 173–189, 2023. DOI: 10.4208/cmr.2022-0041. Disponível em: https://global-sci.com/index.php/cmr/article/view/9099. Acesso em: 5 dec. 2025.