Henning, S., Dieckmann, K., Ignatius, K., Schäfer, M., Zedler, P., Harris, E., Sinha, B., van Pinxteren, D., Mertes, S., Birmili, W., Merkel, M., Wu, Z., Wiedensohler, A., Wex, H., Herrmann, H., Stratmann, F.: Influence of cloud processing on CCN activation behavior in the Thuringian Forest, Germany during HCCT–2010, Atmos. Chem. Phys., 14, 7859–7868, doi:10.5194/acp-14-7859-2014, 2014.