Test examples for nonlinear programming codes W Hock, K Schittkowski Journal of optimization theory and applications 30 (1), 127-129, 1980 | 1953 | 1980 |

NLPQL: A FORTRAN subroutine solving constrained nonlinear programming problems K Schittkowski Annals of operations research 5 (2), 485-500, 1986 | 1879 | 1986 |

More test examples for nonlinear programming codes K Schittkowski Springer Science & Business Media, 2012 | 740 | 2012 |

Test examples for nonlinear programming codes W Hock, K Schittkowski Springer, 1987 | 451 | 1987 |

The nonlinear programming method of Wilson, Han, and Powell with an augmented Lagrangian type line search function K Schittkowski Numerische Mathematik 38 (1), 83-114, 1982 | 422 | 1982 |

On the convergence of a sequential quadratic programming method with an augmented Lagrangian line search function K Schittkowski Mathematische Operationsforschung und Statistik. Series Optimization 14 (2 …, 1983 | 386 | 1983 |

Nonlinear programming codes: information, tests, performance K Schittkowski Springer Science & Business Media, 2012 | 372 | 2012 |

Numerical data fitting in dynamical systems: a practical introduction with applications and software K Schittkowski Springer Science & Business Media, 2002 | 313 | 2002 |

A comparative performance evaluation of 27 nonlinear programming codes W Hock, K Schittkowski Computing 30 (4), 335-358, 1983 | 247 | 1983 |

NLPQLP: A fortran implementation of a sequential quadratic programming algorithm with distributed and non-monotone line search–user’s guide K Schittkowski Report, Department of Computer Science, University of Bayreuth, 2006 | 217 | 2006 |

The cyclic Barzilai-–Borwein method for unconstrained optimization YH Dai, WW Hager, K Schittkowski, H Zhang IMA Journal of Numerical Analysis 26 (3), 604-627, 2006 | 204 | 2006 |

Numerical comparison of nonlinear programming algorithms for structural optimization K Schittkowski, C Zillober, R Zotemantel Structural Optimization 7 (1), 1-19, 1994 | 190 | 1994 |

A trust region SQP algorithm for mixed-integer nonlinear programming O Exler, K Schittkowski Optimization Letters 1 (3), 269-280, 2007 | 130 | 2007 |

EASY-FIT: a software system for data fitting in dynamical systems K Schittkowski Structural and Multidisciplinary Optimization 23 (2), 153-169, 2002 | 105 | 2002 |

Solving constrained nonlinear least squares problems by a general purpose SQP-method K Schittkowski Trends in Mathematical Optimization, 295-309, 1988 | 98 | 1988 |

QL: A Fortran code for convex quadratic programming-User’s guide K Schittkowski Department of Mathematics, University of Bayreuth, Report, Version 2, 2005 | 79 | 2005 |

NLPQLP: A new Fortran implementation of a sequential quadratic programming algorithm for parallel computing K Schittkowski Report, Department of Mathematics, University of Bayreuth, 2001 | 79 | 2001 |

Parameter estimation in systems of nonlinear equations K Schittkowski Numerische Mathematik 68 (1), 129-142, 1994 | 73 | 1994 |

Computational mathematical programming K Schittkowski Springer Science & Business Media, 2013 | 66 | 2013 |

Optimal parameter selection in support vector machines K Schittkowski Journal of Industrial & Management Optimization 1 (4), 465, 2005 | 62 | 2005 |