HAJLASZ, P.; ONNINEN, J. On boundedness of maximal functions in Sobolev spaces. Annales Fennici Mathematici, [S. l.], v. 29, n. 1, p. 167–176, 2004. Disponível em: https://afm.journal.fi/article/view/135096. Acesso em: 25 nov. 2024.