NAKAYASU, A.; RYBKA, P. Integrability of the derivative of solutions to a singular one-dimensional parabolic problem. Topological Methods in Nonlinear Analysis, [S. l.], v. 52, n. 1, p. 239–257, 2018. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2018.031. Acesso em: 17 jan. 2022.