HOFMANN, S.; LEWIS, J. L.; NYSTRÖM, K. Existence of big pieces of graphs for parabolic problems. Annales Fennici Mathematici, [S. l.], v. 28, n. 2, p. 355–384, 2003. Disponível em: https://afm.journal.fi/article/view/135082. Acesso em: 25 nov. 2024.