@article {626,
	title = {Relationships between atmospheric nitrogen inputs and the vertical nitrogen and phosphorus concentration gradients in the lichen Cladonia portentosa},
	journal = {New Phytologist},
	volume = {140},
	year = {1998},
	pages = {519-530},
	author = {Hyvdrinen, M. and Crittenden P.D.}
}
