@book{GerhardRudolfRoettgers2000,
  author    = {Gerhard, A. and Rudolf, E. and R{\"o}ttgers, Hanns R{\"u}diger},
  title     = {Rechtsfragen in Psychiatrie und Neurologie},
  publisher = {Dt. Universit{\"a}ts-Verlag},
  isbn      = {978-382442138},
  year      = {2000},
  language  = {de}
}
@book{GerhardRudolfRoettgers1997,
  author    = {Gerhard, A. and Rudolf, E. and R{\"o}ttgers, Hanns R{\"u}diger},
  title     = {Rechtsfragen in der Psychiatrie},
  publisher = {Dt. Universit{\"a}ts-Verl.},
  isbn      = {978-382442087},
  pages     = {208},
  year      = {1997},
  language  = {de}
}