LATVALA, V. On Lebesgue points of functions in the Sobolev class W1,n. Annales Fennici Mathematici, [S. l.], v. 27, n. 1, p. 205–213, 2002. Disponível em: https://afm.journal.fi/article/view/135036. Acesso em: 14 apr. 2025.