@article {57238,
	title = {Comparative feeding ecology of invasive Ponto-Caspian gobies},
	journal = {Hydrobiologica},
	volume = {703},
	year = {2013},
	chapter = {113},
	keywords = {Exotic species, Food web, Neogobius melanostomus, Ponticola kessleri, Stable isotopes, Trophic niche},
	author = {Joerg Brandner and Juergen Geist and Ulrich K. Schliewen and Alexander F. Cerwenka and Karl Auerswald}
}
@article {27621,
	title = {Naturschutzfachliche Invasivit{\"a}tsbewertung Heracleum mantegazzianum},
	year = {2013},
	institution = {Bundesamt f{\"u}r Naturschutz},
	address = {Bonn},
	keywords = {Bundesamt f{\"u}r Naturschutz, Heracleum mantegazzianum},
	author = {S. Nehring and B. Seitz}
}
@article {27618,
	title = {Verbreitung und Management von Heracleum mantegazzianum Somm. et Lev. (Apiaceae, Spermatophyta) in der Obersauerregion in Luxemburg},
	volume = {114},
	year = {2013},
	keywords = {Heracleum mantegazzianum, Luxemburg},
	url = {http://www.snl.lu/cgi-bin/baseportal.pl?htx=/liste_details\&nb=114},
	author = {F. Richarz and Y. Krippel}
}
@article {27599,
	title = {Wildtiererfassung 2011 im Freistaat Sachsen },
	year = {2013},
	author = {G. Greiser and I. Martin}
}
@unpublished {22244,
	title = {Das Samenverbreitungspotential des Neophyten Fraxinus pennsylvanica im Bremer Stadtwald},
	year = {2013},
	author = {Gr{\"a}pel, Vanessa and Katzenberger, Jakob}
}
@booklet {37,
	title = {Blaubandb{\"a}rbling {\textendash}- Wikipedia, Die freie Enzyklop{\"a}die},
	year = {2013},
	url = {http://de.wikipedia.org/w/index.php?title=Blaubandb\%C3\%A4rbling\&oldid=125504540},
	author = {Wikipedia}
}
