@article {7696,
	title = {{\"O}kologische Aspekte der Ausbreitung von Bidens frondosa L. in Mitteleuropa. Verdr{\"a}ngt er Bidens tripartita L},
	journal = {Flora},
	volume = {180},
	year = {1988},
	month = {1988///},
	pages = {177 - 190},
	author = {U.-V, K{\"o}ck}
}
