Swati Jain, T. Raghuwanshi, A. Goyal, and M. K. Pandey. “On a Projective Semi-Symmetric Connection”. Journal of International Academy of Physical Sciences, vol. 24, no. 04, Dec. 2020, pp. 439-52, https://www.iaps.org.in/journal/index.php/journaliaps/article/view/16.