Sai, K.S. “Unsteady Flow of Two Immiscible Viscous Fluids Over a Naturally Permeable Bed”. Defence Science Journal 40, no. 2 (January 1, 2013): 183-189. Accessed March 28, 2024. https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/4459.