@article {828,
	title = {Lichen Physiology and Air-Pollution .2. Statistical-Analysis of the Correlation between SO2, NO2, NO and O3, and Chlorophyll Content, Net Photosynthesis, Sulfate Uptake and Protein- Synthesis of Parmelia-Sulcata Taylor},
	volume = {115},
	year = {1990},
	pages = {431-437},
	author = {Von Arb, C. and Mueller, C. and Ammann, K. and Brunold, C.}
}
