Borrmann, S. Particle Chemistry, Max Planck Institute for Chemistry, Max Planck Society;
Davis, S., Hlavka, D., Jensen, E., Rosenlof, K., Yang, Q. O., Schmidt, S., et al. (2010). In situ and lidar observations of tropopause subvisible cirrus clouds during TC4. Journal of Geophysical Research-Atmospheres, 115: D00J17. doi:10.1029/2009JD013093.