@article {1523,
	title = {Ozone exposure thresholds and foliar injury on forest plants in Switzerland.},
	journal = {Environmental Pollution},
	volume = {111},
	year = {2001},
	pages = {321-331},
	author = {VanderHayden, D. and Skelly, J. and Innes, J. and Hug, C. and Zhang, J. and Landolt, W. and Bleuler, P.}
}
