@misc{Rohatsch,
  author    = {Rohatsch, Lukas},
  title     = {Open Data Workshop},
  subject      = {Open Data},
  language  = {de}
}
@misc{Rohatsch,
  author    = {Rohatsch, Lukas},
  title     = {Open Data im Unterricht},
  subject      = {Open Data},
  language  = {de}
}