BJÖRN, A.; BJÖRN, J.; LATVALA, V. Sobolev spaces, fine gradients and quasicontinuity on quasiopen sets. Annales Fennici Mathematici, [S. l.], v. 41, n. 2, p. 551–560, 2016. DOI: 10.5186/aasfm.2016.4130. Disponível em: https://afm.journal.fi/article/view/135618. Acesso em: 20 touko. 2024.