LOZHKIN, V. N. Limiting equilibrium of a plane with a circular hole. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 45, n. 7, p. 980–981, 1993. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5891. Acesso em: 7 apr. 2025.