@article{HelsperDreilingHalleretal.2006,
  author    = {Christoph Helsper and V. Dreiling and P. Haller and U. Kaminski},
  title     = {Intercomparison of Eleven Condensation Nucleus Counters / Dreiling, V. ; Haller, P. ; Helsper, C.; Kaminski, U. ; Plomp, A. ; Raes, F. ; Roth, C. ; Schier, J. ; Sch{\"u}rmann, G.},
  journal   = {Journal of Aerosol Science. 17 (1986), H. 3},
  pages     = {565 -- 570},
  year      = {2006},
}