Reference

T. E. E. Grams, Rainer Matyssek (1999): Elevated CO2 Counteracts the Limitation by Chronic Ozone Exposure on Photosynthesis in fagus sylvatica L.: Comparison between Chlorophyll Fluorescence and Leaf Gas Exchange. – Phyton, Annales Rei Botanicae, Horn – 39_4: 31 - 39.