P. P. Khade, A.P. Wasnik, and S. P. Kandalkar. 2018. “KantowskiSachs Bulk Viscous String Cosmological Model In Gravity With Time Varying Deceleration Parameter”. Global Journal of Science Frontier Research 18 (A1):39-46. https://journalofscience.org/index.php/GJSFR/article/view/101247.