@article {1682,
	title = {Interactions of elevated CO2, NH3 and O3 on mycorrhizal infection, gas exchange and N metabolism in saplings of Scots pine.},
	volume = {176},
	year = {1995},
	pages = {107-116},
	author = {Perez-Soba, M and Dueck, T.A. and Puppi, G. and Kuiper, P.J.C.}
}
