@article{HelsperLuetkemeierWiedensohler2006,
  author    = {Christoph Helsper and E. L{\"u}tkemeier and A. Wiedensohler},
  title     = {Charge Distribution by Unipolar Charging of Small Aerosol Particles / L{\"u}tkemeier, E. ; Helsper, C. ; Wiedensohler, A.},
  journal   = {Aerosols : formation and reactivity ; proceedings of the second International Aerosol Conference, 22-26 Sept. 1986, Berlin (West) / Gesellschaft f{\"u}r Aerosolforschung (GAeF) ; American Association for Aerosol Research (AAAR)},
  pages     = {474 -- 478},
  year      = {2006},
}