@article {691,
	title = {Critical levels of O-3 for wood production of European beech (Fagus sylvatica L). },
	journal = {Water, Air and Soil Pollution},
	volume = {85},
	year = {1995},
	pages = {1349-1354},
	author = {Mortensen, L. and BastrubBirk, A. and RoPoulsen, H.}
}
