@article{Krause2012,
  author    = {Krause, Uwe},
  title     = {The Dutch school system},
  series = {Potsdamer geographische Praxis},
  journal   = {Potsdamer geographische Praxis},
  number    = {1},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {2194-1599},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-65828},
  pages     = {67 -- 68},
  year      = {2012},
  language  = {en}
}
@article{Krause2012,
  author    = {Krause, Uwe},
  title     = {Videos related to the maps},
  series = {Potsdamer geographische Praxis},
  journal   = {Potsdamer geographische Praxis},
  number    = {1},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {2194-1599},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-65745},
  pages     = {11 -- 12},
  year      = {2012},
  language  = {en}
}