Error Estimates for the Finite Element Solution of Variational Inequalities. Part II. Mixed Methods. F. Brezzi; W.W. Hager; P.A. Raviart Numerische Mathematik
Error Estimates for the Finite Element Solution of Variational Inequalities. Part I. Primal Theory. F. Brezzi; W.W. Hager; P.A. Raviart — 1977 Numerische Mathematik