@article {8185,
	title = {Bidens frondosa (Asteraceae) - a new alien species for the Bulgarian flora},
	journal = {Phytologia Balcanica},
	volume = {10},
	year = {2004},
	month = {2004///},
	pages = {179 - 181},
	author = {K. Sumberova and R. Tzonev and V. Vladimirov}
}
