@article{BlumensteinBukowskyKraudeltetal.2001,
  author    = {Blumenstein, Oswald and Bukowsky, Heinz and Kraudelt, Heide and Cerovsky, D.},
  title     = {First Results of Soil Investigations in a Mining Area of South Africa},
  year      = {2001},
  language  = {en}
}
@article{KuehlingBukowskyKraudelt2001,
  author    = {K{\"u}hling, Matthias and Bukowsky, Heinz and Kraudelt, Heide},
  title     = {Heavy metal contents of chicken and red toads},
  year      = {2001},
  language  = {en}
}