BARKHA R. TRIPATHI, ATUL TYAGI, and SWATI PARIKH. “BIANCHI TYPE I STRING COSMOLOGICAL MODEL IN CYLINDRICALLY SYMMETRIC INHOMOGENEOUS UNIVERSE”. International Journal of Innovations in Engineering Research and Technology 3, no. 9 (February 11, 2021): 1–7. Accessed January 6, 2025. https://repo.ijiert.org/index.php/ijiert/article/view/921.