Pannatier, Elisabeth Graf, Jörg Luster, Stephan Zimmermann, and Peter Blaser. “Monitoring of Water Chemistry in Forest Soils: An Indicator for Acidification: Highlights of Analytical Chemistry in Switzerland”. CHIMIA 59, no. 12 (December 12, 2005): 989. Accessed April 4, 2025. https://www.chimia.ch/chimia/article/view/2005_989.