@article {848,
	title = {Some effects of N on ectomycorrhizal diversity of Scots pine (Pinus sylvestris L.) in northeastern Germany. },
	journal = {Water, Air and Soil Pollution},
	volume = {116},
	year = {1999},
	pages = {135-140},
	author = {W{\"o}llecke, J. and Munzenberger, B. and Huttl, R.F.}
}
@article {168,
	title = {Reaction of mycorrhizal and non-mycorrhizal Scots Pine fine roots along a deposition gradient of air pollutants in eastern Germany},
	journal = {Water, Air and Soil Pollution},
	volume = {85},
	year = {1995},
	pages = {1191-1196},
	author = {Munzenberger, B. and Schminke, B. and Strubelt, F. and Huettl, R.F.}
}
