Wankhade, Rajesh. “Plane Symmetric Inflationary Universe With Hybrid Expansion Law and Time Varying Λ”. International Journal of Advanced Astronomy 6, no. 1 (April 10, 2018): 5–7. Accessed May 9, 2024. https://www.sciencepubco.com/index.php/IJAA/article/view/9551.