Finite element error estimates for Neumann boundary control problems on graded meshes T Apel, J Pfefferer, A Rösch Computational Optimization and Applications 52 (1), 3-28, 2012 | 41 | 2012 |

Fractional operators with inhomogeneous boundary conditions: Analysis, control, and discretization H Antil, J Pfefferer, S Rogovs arXiv preprint arXiv:1703.05256, 2017 | 39 | 2017 |

Finite element error estimates on the boundary with application to optimal control T Apel, J Pfefferer, A Rösch Mathematics of Computation 84 (291), 33-70, 2015 | 38 | 2015 |

On the regularity of the solutions of Dirichlet optimal control problems in polygonal domains T Apel, M Mateos, J Pfefferer, A Rösch SIAM Journal on Control and Optimization 53 (6), 3620-3641, 2015 | 35 | 2015 |

Error estimates for Dirichlet control problems in polygonal domains: quasi-uniform meshes T Apel, M Mateos, J Pfefferer, A Rösch Mathematical Control & Related Fields 8 (1), 217, 2018 | 22 | 2018 |

Finite element discretization of state-constrained elliptic optimal control problems with semilinear state equation I Neitzel, J Pfefferer, A Rösch SIAM Journal on Control and Optimization 53 (2), 874-904, 2015 | 22 | 2015 |

Discretization of the P oisson equation with non‐smooth data and emphasis on non‐convex domains T Apel, S Nicaise, J Pfefferer Numerical Methods for Partial Differential Equations 32 (5), 1433-1454, 2016 | 21 | 2016 |

A note on semilinear fractional elliptic equation: analysis and discretization H Antil, J Pfefferer, M Warma ESAIM: Mathematical Modelling and Numerical Analysis 51 (6), 2049-2067, 2017 | 17 | 2017 |

Numerical analysis for elliptic Neumann boundary control problems on polygonal domains J Pfefferer Universitätsbibliothek der Universität der Bundeswehr München, 2014 | 16 | 2014 |

-Finite Elements for Fractional Diffusion D Meidner, J Pfefferer, K Schürholz, B Vexler SIAM Journal on Numerical Analysis 56 (4), 2345-2374, 2018 | 13 | 2018 |

Adapted Numerical Methods for the Poisson Equation with Boundary Data in NonConvex Domains T Apel, S Nicaise, J Pfefferer SIAM Journal on Numerical Analysis 55 (4), 1937-1957, 2017 | 12* | 2017 |

Finite element error estimates for normal derivatives on boundary concentrated meshes J Pfefferer, M Winkler SIAM Journal on Numerical Analysis 57 (5), 2043-2073, 2019 | 8 | 2019 |

Local mesh refinement for the discretization of Neumann boundary control problems on polyhedra T Apel, J Pfefferer, M Winkler Mathematical Methods in the Applied Sciences 39 (5), 1206-1232, 2016 | 8 | 2016 |

Superconvergence for Neumann boundary control problems governed by semilinear elliptic equations K Krumbiegel, J Pfefferer Computational Optimization and Applications 61 (2), 373-408, 2015 | 7 | 2015 |

A short Matlab implementation of fractional Poisson equation with nonzero boundary conditions H Antil, J Pfefferer Technical report, 2017 | 6 | 2017 |

A dual singular complement method for the numerical solution of the Poisson equation with boundary data in non-convex domains T Apel, S Nicaise, J Pfefferer arXiv preprint arXiv:1505.00414, 2015 | 5 | 2015 |

Graded meshes in optimal control for elliptic partial differential equations: an overview T Apel, J Pfefferer, A Rösch Trends in PDE constrained optimization, 285-302, 2014 | 5 | 2014 |

Error estimates for the postprocessing approach applied to Neumann boundary control problems in polyhedral domains T Apel, M Winkler, J Pfefferer IMA Journal of Numerical Analysis 38 (4), 1984-2025, 2018 | 4 | 2018 |

Finite element error estimates in for regularized discrete approximations to the obstacle problem D Hafemeyer, C Kahle, J Pfefferer Numerische Mathematik 144 (1), 133-156, 2020 | 2 | 2020 |

Maximum norm error estimates for Neumann boundary value problems on graded meshes T Apel, S Rogovs, J Pfefferer, M Winkler IMA Journal of Numerical Analysis, 2018 | 2 | 2018 |