@article{LeTo99a,
  author=       {Robert Michael Lewis and Virginia Torczon},
  title=        {Pattern Search Algorithms for Bound Constrained Minimization},
  journal=      {{SIAM} Journal on Optimization},
  volume=       {9},
  number=       {4},
  year=         {1999},
  pages=        {1082--1099},
  doi=          {10.1137/S1052623496300507}
}