@article{PietzFaetkenheuerBurgardetal.1997,
  author    = {Pietz, J. and F{\"a}tkenheuer, Brigitte and Burgard, P. and Armbruster, M. and Esser, G{\"u}nter and Schmidt, Martin H.},
  title     = {Psychiatric disorders in adult patients with early-treated phenylketonuria},
  year      = {1997},
  language  = {en}
}
@article{FaetkenheuerEsser1996,
  author    = {F{\"a}tkenheuer, Brigitte and Esser, G{\"u}nter},
  title     = {Generationstransfer seelischer Gesundheit in Rostock und Mannheim},
  year      = {1996},
  language  = {de}
}