SRINIVASACHARYA, D.; KRISHNA PRASAD, M. Axi-symmetric motion of a porous approximate sphere in an approximate spherical container. Archives of Mechanics, Warsaw, Poland, v. 65, n. 6, p. 485–509, 2013. Disponível em: https://am.ippt.pan.pl/index.php/am/article/view/v65p485. Acesso em: 12 dec. 2025.