P. O. Bagde, and K. T. Thomas. “On Non-Vacuum Static Spherically Symmetric Solution in $f(R)$ Theory of Gravity in $V_5$”. International Journal of Mathematics And its Applications 3, no. 4 - F (December 30, 2015): 73–77. Accessed July 22, 2024. https://ijmaa.in/index.php/ijmaa/article/view/535.