6Jean Cross. Electrostatics: Principles, problems and Applications. Bristol, 1987.
7Akiko Kumada,Shigemitsu Okabe,Kunihiko Hidaka. Influences of probe geonaetry and experimeqtal errors on spatial resolution of surface charge measurement with electrostatic probe .IEEE Transactionson Dielectrics and Electrical Insulation.2005,12(6) : 1172-1181.
