@article{FreyhofKottelatNolte2009,
  author    = {J{\"o}rg Freyhof and Maurice Kottelat and Arne Nolte},
  title     = {Taxonomic diversity of European Cottus : with description of eight new species (Teleostei: Cottidae)},
  journal   = {Ichthyological exploration of freshwaters},
  volume    = {16},
  number    = {2},
  pages     = {107 -- 172},
  year      = {2009},
}