@article{HelsperHornSchneideretal.2009,
  author    = {Christoph Helsper and Hans-Georg Horn and Friedhelm Schneider and Birgit Wehner},
  title     = {Intercomparison of five mobility size spectrometers for measuring atmospheric submicrometer aerosol particles / Helsper, Christoph ; Horn, Hans-Georg ; Schneider, Friedhelm ; Wehner, Birgit ; Wiedensohler, Alfred},
  journal   = {Gefahrstoffe, Reinhaltung der Luft. Air Quality Control. 68 (2008), H. 11-12},
  pages     = {475 -- 481},
  year      = {2009},
}