@article{Esser2009,
  author    = {Esser, G{\"u}nter},
  title     = {Umschriebene Entwicklungsst{\"o}rungen},
  isbn      = {9788-3-642-01476-5},
  year      = {2009},
  language  = {de}
}
@article{KrentzEsser2009,
  author    = {Krentz, Eva Maria and Esser, G{\"u}nter},
  title     = {Muth-Seidel, D., Petermann, F., Training f{\"u}r Kinder mit r{\"a}umlich-konstruktiven St{\"o}rungen; G{\"o}ttingen, Hogrefe, 2008},
  issn      = {1616-3443},
  doi       = {10.1026/1616-3443.38.2.146},
  year      = {2009},
  language  = {de}
}
@article{EsserBakhshayeshDruegeetal.2009,
  author    = {Esser, G{\"u}nter and Bakhshayesh, Ali Reza and Dr{\"u}ge, Sebastian and Ihle, Wolfgang},
  title     = {Wirksamkeit von Neuro- und EMG-Feedback bei Kindern mit ADHS : eine Follow-up-Studie},
  year      = {2009},
  language  = {de}
}