At the IS&T- NIP11 conference 95 in Hilton Head, South Carolina we made a short introduction of the concept of our new
Andreas Küttner, Reinhold H. Epping, Reinhold Hess, Matthias G. Hackenberg, "Theory and Practice of a Small Toner-Charge-Spectrometer" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP14), 1998, pp 623 - 626, https://doi.org/10.2352/ISSN.2169-4451.1998.14.1.art00069_2