Dr. S. D. Katore, et al. “Accelerating And Decelerating Hypersurface-Homogeneous Cosmological Models In Barberas Second Self-Creation Theory”. Global Journal of Science Frontier Research, vol. 12, no. F3, Mar. 2012, pp. 41-49, https://journalofscience.org/index.php/GJSFR/article/view/100222.