SAI, K. Unsteady Flow of Two Immiscible Viscous Fluids Over a Naturally Permeable Bed. Defence Science Journal, [S. l.], v. 40, n. 2, p. 183–189, 2013. DOI: 10.14429/dsj.40.4459. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/4459. Acesso em: 6 jul. 2025.