B. N. PRASAD; T. N. PANDEY AND MANOJ KUMAR SINGH. Three Dimensional Conformally Flat Landsberg and Berwald Spaces. Journal of International Academy of Physical Sciences, [S. l.], v. 13, n. 3, p. 299–309, 2009. Disponível em: https://www.iaps.org.in/journal/index.php/journaliaps/article/view/195. Acesso em: 5 may. 2024.