Explicit error bounds in a conforming finite element method

Remarks on a posteriori error estimation for finite element solutions

Journal of Computational and Applied Mathematics - Special issue: Scientific computing, computer arithmetic, and validated numerics (SCAN 2004)

Efficient computable error bounds for discontinuous Galerkin approximations of elliptic problems

Journal of Computational and Applied Mathematics

Guaranteed and robust discontinuous Galerkin a posteriori error estimates for convection-diffusion-reaction problems

Journal of Computational and Applied Mathematics

Guaranteed and Fully Robust a posteriori Error Estimates for Conforming Discretizations of Diffusion Problems with Discontinuous Coefficients

Journal of Scientific Computing

Robust Equilibrated Residual Error Estimator for Diffusion Problems: Conforming Elements

SIAM Journal on Numerical Analysis