@article{Straessner1994,
  author    = {Str{\"a}ßner, Hans},
  title     = {Experimente helfen das Prinzip der Trinkwasserversorgung verstehen},
  year      = {1994},
  language  = {de}
}
@article{Straessner1994,
  author    = {Str{\"a}ßner, Hans},
  title     = {Zur Entwicklung des Wagens als Transportmittel},
  year      = {1994},
  language  = {de}
}