9Akao Yoshinori, Kobayashi Kazuhiko, Seki Yoko. Examina-tion of spur marks found on ink jet-printed documents[J]. Jour- nal Forensic Sciences, 2005,50 (4) : 915-923.
10Gerald M. Laporte. The use of an ele,trostatic detection device to identify individual and class characteristics on documents produced by printers and copieI-a preliminary study[J]. Journal Forensic Seience, 2004.49(3) :610-620.