@article{Pittner2009,
  author    = {Karin Pittner},
  title     = {Zur morphologischen Defektivit{\"a}t des Pronomens wer},
  journal   = {Deutsch als Fremdsprache},
  volume    = {33},
  number    = {2},
  pages     = {73 -- 77},
  url       = {http://homepage.ruhr-uni-bochum.de/Karin.Pittner/morphdef.pdf},
  year      = {2009},
}