@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}
}
