NGUEN, Byong. Convergence rates and finite-dimensional approximation for a class of ill-posed variational inequalities. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 5, p. 629–637, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5043. Acesso em: 5 dec. 2025.