@article {715,
	title = {Inter actions of elevated CO2, NH3 and O3 on mycorrhizal infection, gas exchange and N metabolism in seedlings of Scots pine},
	volume = {176},
	year = {1995},
	pages = {107-116},
	author = {Pirez-Soba, M. and Dueck, T.A. and Puppi, G. and Kuiper, P.J.C.}
}
