Yassaa, N., Song, W., Lelieveld, J., Vanhatalo, A., Bäck, J., & Williams, J. (2012). Diel cycles of isoprenoids in the emissions of Norway spruce, four Scots pine chemotypes, and in Boreal forest ambient air during HUMPPA-COPEC-2010. Atmospheric Chemistry and Physics, 12(15), 7215-7229.