@article{HelsperFissanKasper2006,
  author    = {Christoph Helsper and H. J. Fißan and W. Kasper},
  title     = {Calibration of Optical Particle Counters with Respect to Particle Size / Fißan, H. J. ; Helsper, C.; Kasper, W.},
  journal   = {Particle and Particle Systems Characterization. 1 (1984), H. 1984},
  pages     = {108 -- 111},
  year      = {2006},
}