Ammann M, Siegwolf R, Pichlmayer F, Suter M, Saure M, Brunold C. Estimating the uptake of traffic-derived NO2 from N-15 abundance in Norway spruce needles. Oecologia. 1999  ;118(2):124-131.

Ammann M, von Ballmoos P, Stalder M, Suter M, Brunold C. Uptake and assimilation of atmospheric NO2-N by spruce needles (Picea abies): a field study. Water, Air and Soil Pollution . 1995  ;85:1497-1502.

Galli U, Schuepp H, Brunold C. Heavy-metal binding by mycorrhizal fungi. Physiologia Plantarum. 1994  ;92:364-368.

Von Arb C, Mueller C, Ammann K, Brunold C. 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. New Phytologist. 1990  ;115:431-437.