@article {7130,
	title = {Cytology of Erigeron annuus s.l. and its consequences in Europe},
	journal = {Bot. Helv},
	volume = {113},
	year = {2003},
	month = {2003///},
	pages = {1 - 14},
	author = {D. Frey and M. Baltisberger and P.J. Edwards}
}
