B. N. Prasad and T. N. Pandey and Manoj Kumar Singh (2009) “Three Dimensional Conformally Flat Landsberg and Berwald Spaces”, Journal of International Academy of Physical Sciences, 13(3), pp. 299–309. Available at: https://www.iaps.org.in/journal/index.php/journaliaps/article/view/195 (Accessed: 5 May 2024).