Reference

I. K. Bucher-Wallin, M. A. Sonnleitner, P. Egli, Madeleine S. Günthardt-Goerg, David Tarjan, R. Schulin, Jürg B. Bucher (2000): Effects of Elevated CO2, Increaed Nitrogen Deposition and Soil on Evapotranspiration and Water Use Efficiency on Spruce-Beech Model Ecosystems. – Phyton, Annales Rei Botanicae, Horn – 40_4: 49 - 60.