@article {629,
	title = {Potential NH4+ \& NO3- uptake in seven Sphagnum species},
	volume = {138},
	year = {1998},
	pages = {287-293},
	author = {Jauhiainen, J. and Wallen, B. and Malmer, N.}
}
@article {475,
	title = {Growth limiting nutrients in Sphagnum dominated bogs subject to low and high atmospheric Nitrogen supply},
	volume = {80},
	year = {1992},
	pages = {131-40},
	author = {Aerts, R. and Wallen, B. and Malmer, N.}
}
