WOJNO, W. Solution for an Irregular Perturbation Problem of Viscoplastic Spherical Container Under Internal Pressure. Engineering Transactions, [S. l.], v. 41, n. 2, p. 209–235, 1993. Disponível em: http://et.ippt.gov.pl/index.php/et/article/view/1565. Acesso em: 17 jan. 2026.