B. Padmavathi and T. Amaranath, “Stokes flow past a composite porous spherical shell with a solid core”, Arch. Mech., vol. 48, no. 2, pp. 311–323, Jan. 1996, Accessed: Jan. 17, 2026. [Online]. Available: http://am.ippt.gov.pl/index.php/am/article/view/v48p311