An a posteriori residual error estimator for the finite element method on anisotropic tetrahedral meshes. - Gerd Kunert (Numerische Mathematik, 2000)

Edge residuals dominate a posteriori error estimates for linear finite element methods on anisotropic triangular and tetrahedral meshes. - Gerd Kunert; Rüdiger Verfürth (Numerische Mathematik, 2000)

Robust a Posteriori Error Estimation for a Singularly Perturbed Reaction-Diffusion Equation on Anisotropic Tetrahedral Meshes. - Gerd Kunert (Adv. Comput. Math., 2001)

A Local Problem Error Estimator for Anisotropic Tetrahedral Finite Element Meshes. - Gerd Kunert (SIAM J. Numer. Anal., 2001)

A Note on the Energy Norm for a Singularly Perturbed Model Problem. - Gerd Kunert (Computing, 2002)

A Posteriori Error Estimation for a Finite Volume Discretization on Anisotropic Meshes. - Mohammed Afif; Brahim Amaziane; Gerd Kunert; Zoubida Mghazli; Serge Nicaise (J. Sci. Comput., 2010)