@article{HelsperMoelterHaller2006,
  author    = {Christoph Helsper and W. M{\"o}lter and P. Haller},
  title     = {Representative Dilution of Aerosols by a Factor of 10,000},
  journal   = {Journal of Aerosol Science. 21 (1990), H. Suppl. 1},
  pages     = {637 -- 640},
  year      = {2006},
}