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 Kindermann, G.; Huve, K.; Slovik, S.; Lux, H.; Rennenberg, H. Phyton Horn 35(2): 255-267 1995 https://eurekamag.com/research/002/879/002879964.php