A priori error estimates for space–time finite element discretization of semilinear parabolic optimal control problems I Neitzel, B Vexler Numerische Mathematik 120, 345-386, 2012 | 100 | 2012 |

On regularization methods for the numerical solution of parabolic control problems with pointwise state constraints I Neitzel, F Tröltzsch ESAIM: Control, Optimisation and Calculus of Variations 15 (2), 426-453, 2009 | 65 | 2009 |

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 | 47 | 2015 |

An optimal control problem governed by a regularized phase field fracture propagation model WW Ira Neitzel, Thomas Wick http://igdk.eu/foswiki/pub/IGDK1754/Preprints/NeitzelWickWollner_2015.pdf, 2015 | 43* | 2015 |

On convergence of regularization methods for nonlinear parabolic optimal control problems with control and state constraints I Neitzel, F Troltzsch Control and Cybernetics 37 (4), 1013-1043, 2008 | 41 | 2008 |

Strategies for time-dependent PDE control with inequality constraints using an integrated modeling and simulation environment I Neitzel, U Prüfert, T Slawig Numerical Algorithms 50, 241-269, 2009 | 40 | 2009 |

A Smooth regularization of the projection formula for constrained parabolic optimal control problems I Neitzel, U Prüfert, T Slawig Numerical Functional Analysis and Optimization 32 (12), 1283-1315, 2011 | 38* | 2011 |

Regularization for semilinear elliptic optimal control problems with pointwise state and control constraints K Krumbiegel, I Neitzel, A Rösch Computational Optimization and Applications 52, 181-207, 2012 | 27* | 2012 |

An optimal control problem governed by a regularized phase-field fracture propagation model. part ii: The regularization limit I Neitzel, T Wick, W Wollner SIAM Journal on Control and Optimization 57 (3), 1672-1690, 2019 | 26 | 2019 |

Second order optimality conditions for optimal control of quasilinear parabolic equations L Bonifacius, I Neitzel Math. Control Relat. Fields 8 (1), 1-34, 2018 | 26 | 2018 |

A sparse control approach to optimal sensor placement in PDE-constrained parameter estimation problems I Neitzel, K Pieper, B Vexler, D Walter Numerische Mathematik 143 (4), 943-984, 2019 | 24 | 2019 |

Sufficient Optimality Conditions for the Moreau-Yosida-type Regularization Concept Applied to Semilinear Elliptic Optimal Control Problems with Pointwise State Constraints K Krumbiegel, I Neitzel, A Rösch Mathematics and its Applications - Annals of AOSR 2 (2), 222-246, 2010 | 22 | 2010 |

Dirichlet control of elliptic state constrained problems M Mateos, EPI Departmento de Matemáticas, I Neitzel Computational Optimization and Applications, 2015 | 17 | 2015 |

A-posteriori error estimation of discrete POD models for PDE-constrained optimal control M Gubisch, I Neitzel, S Volkwein Model reduction of parametrized systems, 213-234, 2017 | 16 | 2017 |

Strategies for time-dependent pde control using an integrated modeling and simulation environment. part one: problems without inequality constraints I Neitzel, U Prüfert, T Slawig | 15 | 2007 |

Multigoal-oriented optimal control problems with nonlinear PDE constraints B Endtmayer, U Langer, I Neitzel, T Wick, W Wollner Computers & Mathematics with Applications 79 (10), 3001-3026, 2020 | 13 | 2020 |

On linear-quadratic elliptic control problems of semi-infinite type P Merino, I Neitzel, F Tröltzsch Applicable Analysis 90 (6), 1047-1074, 2011 | 13 | 2011 |

Convergence of the SQP method for quasilinear parabolic optimal control problems F Hoppe, I Neitzel Optimization and Engineering 22 (4), 2039-2085, 2021 | 11 | 2021 |

Optimal control of quasilinear parabolic PDEs with state-constraints F Hoppe, I Neitzel SIAM Journal on Control and Optimization 60 (1), 330-354, 2022 | 10 | 2022 |

Error estimates for the finite element discretization of semi-infinite elliptic optima control problems. P Merino, I Neitzel, F Tröltzsch Discussiones Mathematicae: Differential Inclusions, Control & Optimization …, 2010 | 10 | 2010 |