D. Srinivasacharya and M. Krishna Prasad, “Axi-symmetric motion of a porous approximate sphere in an approximate spherical container”, Arch. Mech., vol. 65, no. 6, pp. 485–509, Nov. 2013, Accessed: Jan. 17, 2026. [Online]. Available: http://am.ippt.gov.pl/index.php/am/article/view/v65p485