Dusek, U., Frank, G. P., Curtius, J., Drewnick, F., Schneider, J., Kürten, A., et al. (2010). Enhanced organic mass fraction and decreased hygroscopicity of cloud condensation nuclei (CCN) during new particle formation events. Geophysical Research Letters, 37: L03804. doi:10.1029/2009GL040930.