S. K. Pal, M. K. Pandey, and R. N. Singh. “A Note on Special Projective Semi-Symmetric Connection”. Journal of International Academy of Physical Sciences 18, no. 1 (March 15, 2014): 47–57. Accessed May 15, 2024. https://www.iaps.org.in/journal/index.php/journaliaps/article/view/466.