SHANKER, G. Four-dimensional Conformally Flat Berwald and Landsberg Spaces. The Journal of the Indian Mathematical Society, [S. l.], v. 85, n. 1-2, p. 241–255, 2018. DOI: 10.18311/jims/2018/14930. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/14930. Acesso em: 19 may. 2024.