Reference

Gerald Kindermann, Katja Hüve, Stefan Slovik, Herbert Lux, Heinz Rennenberg (1995): Is Emission of Hydrogen Sulfide a Dominant Factor of SO2 Detoxification? - A Comparison of Norway Spruce (Picea abies (L.) Karst.), Scots Pine (Pinus sylvestris L.) and Blue Spruce (Picea pungens Engelm.) in the Ore Mountains. – Phyton, Annales Rei Botanicae, Horn – 35_2: 255 - 267.