LINFINITY-Error Estimates on Graded Meshes with Application to Optimal Control. - Thomas Apel; Arnd Rösch; Dieter Sirch (SIAM J. Control. Optim., 2009)

Optimal control of the Stokes equations: conforming and non-conforming finite element methods under reduced regularity. - Serge Nicaise; Dieter Sirch (Comput. Optim. Appl., 2011)

A posteriori error estimation of residual type for anisotropic diffusion-convection-reaction problems. - Thomas Apel; Serge Nicaise; Dieter Sirch (J. Comput. Appl. Math., 2011)

A Priori Mesh Grading for an Elliptic Problem with Dirac Right-Hand Side. - Thomas Apel; Olaf Benedix; Dieter Sirch; Boris Vexler (SIAM J. Numer. Anal., 2011)

A Priori Mesh Grading for Distributed Optimal Control Problems. - Thomas Apel; Dieter Sirch (Constrained Optimization and Optimal Control for Partial Differential Equations, 2012)