MÜLLER, J.-S. A density result for Sobolev functions and functions of higher order bounded variation with additional integrability constraints. Annales Fennici Mathematici, [S. l.], v. 41, n. 2, p. 789–801, 2016. DOI: 10.5186/aasfm.2016.4150. Disponível em: https://afm.journal.fi/article/view/135635. Acesso em: 20 may. 2024.