@article{HemmHuckButtleretal.2008,
  author    = {Klaus Hemm and Stefan Huck and Karl-Peter Buttler and Heinz Kalheber},
  title     = {Der Nordische Augentrost (Euphrasia frigida) in Hessen},
  journal   = {Botanik und Naturschutz in Hessen},
  volume    = {21},
  pages     = {11 -- 32},
  year      = {2008},
}