@article{BoitenMoeller2004,
  author    = {Eerke A. Boiten and Bernhard M{\"o}ller},
  title     = {Foreword},
  journal   = {Science of Computer Programming},
  volume    = {51},
  number    = {1-2},
  pages     = {1 -- 2},
  doi       = {10.1016/j.scico.2004.01.009},
  year      = {2004},
}