@article {8111,
	title = {Cl{\'e} de d{\'e}termination des esp{\`e}ces du genre Bidens connue en Belgique et dans les r{\'e}gions voisines},
	journal = {Nat. Mosana},
	volume = {17},
	year = {1964},
	month = {1964///},
	pages = {51 - 52},
	author = {M. Debray}
}
@article {7396,
	title = {Les esp{\`e}ces du genre Bidens introduites en France. Rectifications et nouvelles donn{\'e}es},
	journal = {Cah. Nat., Bull. N. P},
	volume = {24},
	year = {1968},
	month = {1968///},
	pages = {53 - 58},
	author = {M. Debray}
}
@article {7398,
	title = {Les esp{\`e}ces du genre Bidens introduites en France. Morphologie et g{\'e}ographie},
	journal = {Cah.Nat., Bull. N. P},
	volume = {19},
	year = {1963},
	month = {1963///},
	pages = {33 - 50},
	author = {M. Debray}
}
