MEDAK, B.; TRET’YAKOV, A. A.; ŻOŁĄDEK, H. Solutions to some singular nonlinear boundary value problems. Topological Methods in Nonlinear Analysis, [S. l.], v. 41, n. 2, p. 255–265, 2013. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2013.011. Acesso em: 27 apr. 2024.