@article{HelsperWiedensohlerWeiseetal.2006,
  author    = {Christoph Helsper and A. Wiedensohler and W. Weise and E. L{\"u}tkemeier},
  title     = {Determination of the Bipolar Charge Equilibrium in Pure Gases / Wiedensohler, A. ; Weise, W. ; Helsper, C. ; L{\"u}tkemeier, E.},
  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     = {383 -- 386},
  year      = {2006},
}