@article{HelsperMoelter2006,
  author    = {Christoph Helsper and W. M{\"o}lter},
  title     = {Determination and Neutralization of the Charge Produced by the Dispersion of Powders},
  journal   = {Journal of Aerosol Science. 18 (1987), H. 6},
  pages     = {877 -- 880},
  year      = {2006},
}