@article{Kuehling2001, author = {K{\"u}hling, Matthias}, title = {A selection of taxonomic indicator groups for ecological evaluation}, 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} }