@book {8531, title = {Fluctuations in numbers of neophytes, especially Impatiens glandulifera, in permanent plots in a west German flooodplain during}, year = {2004}, month = {2004///}, pages = {13 - 13}, publisher = {Berlin: Biological invasions: challenges for science. [available online at}, organization = {Berlin: Biological invasions: challenges for science. [available online at}, author = {G. Kasperek} } @article {8457, title = {Species of Cotoneaster (Rosaceae, Maloideae) indigenous to, naturalising or commonly cultivated in Central Europe}, journal = {Willdenowia}, volume = {40}, year = {2010}, month = {2010///}, pages = {13 - 45}, url = {http://user.uni-frankfurt.de/ kasperek/papers/dickore_kasperek_2010.pdf}, author = {G. Kasperek} } @article {7667, title = {Kiwifruit (Actinidia deliciosa Liang \& Ferguson) occurring in the wild in western Germany}, journal = {Flor. Rundbr}, volume = {37}, year = {2003}, month = {2003///}, pages = {11 - 18}, author = {G. Kasperek} }