PANDEY, P. N.; GUPTA, M. K. On a four-dimensional Berwald space with vanishing h-connection vector $ k_i$. Tamkang Journal of Mathematics, [S. l.], v. 39, n. 2, p. 121–130, 2008. DOI: 10.5556/j.tkjm.39.2008.22. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/22. Acesso em: 4 may. 2024.