@article {6840,
	title = {On the ecology of Cotula coronopifolia L. and Ranunculus sceleratus L.: 1. Geographic distribution, habitat, and field observations},
	journal = {Acta Bot. Neerl},
	volume = {29},
	year = {1980},
	month = {1980///},
	pages = {385 - 396},
	author = {J. Van der Toorn}
}
@article {6841,
	title = {Floristische notities 1-18},
	journal = {Acta Bot. Neerl},
	volume = {5},
	year = {1956},
	month = {1956///},
	pages = {102 - 114},
	author = {S.J. Van Ooststroom and Th.J. Reichgelt}
}
@article {6842,
	title = {Het geslacht Medicago in Nederland en Belgi{\"e}},
	journal = {Acta Bot. Neerl},
	volume = {7},
	year = {1958},
	month = {1958///},
	pages = {90 - 123},
	author = {S.J. Van Ooststroom and Th.J. Reichgelt}
}
