1. W.M. Arnold, U. Zimmerman, J. of Electrostatics, 21, (1988), 151–191.
2. G. De Gasperis, X. Wang, J. Yang, F.F. Becker, P.R.C. Gascoyne, Meas. Sci. Technol., 9, (1998), 518–529.
3. Y. Liu, W. Abel, J. Janette, F. Belch, R. J. Tweedie, US Patent 5,691,633, Nov. 25, 1997.
4. W.H. Coulter, C.M. Rodriguez, US Patent 4,791,355, Dec. 13, 1988.
5. H. Ackler, P. Krulevitch, R. Miles, W. Benett, S. Swierkowski, V. Malba, P.R.C. Gascoyne, X. Wang, G. De Gasperis, Proc. 194th Meeting Elchem. Soc., Boston, (1998), 54–61.