@article {1119,
	title = {Differential effects of nitrate and ammonium on three fen bryophyte species in relation to pollutant nitrogen input.},
	journal = {New Phytologist},
	volume = {164},
	year = {2004},
	pages = {451-458},
	author = {Paulissen, M.P.C.P. and van der Ven, P.J.M. and Dees, A.J. and Bobbink, R.}
}
