@article{VoglerLarsen2003,
  author    = {Walter Vogler and Kim Larsen},
  title     = {Preface},
  journal   = {Electronic Notes in Theoretical Computer Science},
  volume    = {68},
  number    = {5},
  pages     = {135 -- 136},
  doi       = {10.1016/s1571-0661(05)80524-9},
  year      = {2003},
}