A rapidly convergent descent method for minimization R Fletcher, MJD Powell The Computer Journal 6 (2), 163-168, 1963 | 6266 | 1963 |

An efficient method for finding the minimum of a function of several variables without calculating derivatives MJD Powell The computer journal 7 (2), 155-162, 1964 | 5353 | 1964 |

A fast algorithm for nonlinearly constrained optimization calculations MJD Powell Numerical analysis, 144-157, 1978 | 2486 | 1978 |

Radial basis functions for multivariable interpolation: a review MJD Powell Algorithms for approximation, 143-167, 1987 | 2327 | 1987 |

Restart procedures for the conjugate gradient method MJD Powell Mathematical programming 12 (1), 241-254, 1977 | 2142 | 1977 |

A method for non-linear constraints in minimization problems MJD Powell Optimization, 283-298, 1969 | 1946 | 1969 |

Approximation theory and methods MJD Powell Cambridge university press, 1981 | 1463 | 1981 |

The theory of radial basis function approximation in 1990 MJD Powell University of Cambridge. Department of Applied Mathematics and Theoretical …, 1990 | 1263 | 1990 |

The BOBYQA algorithm for bound constrained optimization without derivatives MJD Powell Cambridge NA Report NA2009/06, University of Cambridge, Cambridge, 2009 | 1166 | 2009 |

A hybrid method for nonlinear equations MJD Powell Numerical methods for nonlinear algebraic equations 7, 87-114, 1970 | 1075 | 1970 |

A direct search optimization method that models the objective and constraint functions by linear interpolation MJD Powell Advances in optimization and numerical analysis, 51-67, 1994 | 943 | 1994 |

A direct search optimization method that models the objective and constraint functions by linear interpolation MJD Powell University of Cambridge, Department of Applied Mathematics and Theoretical …, 1992 | 943 | 1992 |

A method for minimizing a sum of squares of non-linear functions without calculating derivatives MJD Powell The Computer Journal 7 (4), 303-307, 1965 | 858 | 1965 |

The convergence of variable metric methods for non-linearly constrained optimization calculations MJD Powell Nonlinear programming 3, 1978 | 778 | 1978 |

Algorithms for nonlinear constraints that use Lagrangian functions MJD Powell Mathematical programming 14 (1), 224-248, 1978 | 621 | 1978 |

A new algorithm for unconstrained optimization MJD Powell Nonlinear programming, 31-65, 1970 | 612 | 1970 |

Direct search algorithms for optimization calculations MJD Powell Acta numerica 7, 287-336, 1998 | 601 | 1998 |

Nonconvex minimization calculations and the conjugate gradient method MJD Powell Numerical analysis, 122-141, 1984 | 594 | 1984 |

Variable metric methods for constrained optimization MJD Powell Mathematical Programming The State of the Art, 288-311, 1983 | 590 | 1983 |

On the estimation of sparse Jacobian matrices AR Curtis, MJD Powell, JK Reid J. Inst. Math. Appl 13 (1), 117-120, 1974 | 576 | 1974 |