@article{BerghammerMoellerStruth2008,
  author    = {Rudolf Berghammer and Bernhard M{\"o}ller and Georg Struth},
  title     = {Preface: Relations and Kleene Algebra in computer science},
  journal   = {Lecture Notes in Computer Science},
  volume    = {4988},
  pages     = {V -- VI},
  doi       = {10.1007/978-3-540-78913-0},
  year      = {2008},
}