BILDHAUER, M.; FUCHS, M.; REPIN, S. Duality based a posteriori error estimates for higher order variational inequalities with power growth functionals. Annales Fennici Mathematici, [S. l.], v. 33, n. 2, p. 475–490, 2008. Disponível em: https://afm.journal.fi/article/view/135242. Acesso em: 17 touko. 2024.