5G.J. Throckmorton. Erasable ink; its ease of erasability and its permanence[J]. Journal of Forensic Sciences , 1985, 30 (2):526-531.
6Jacques A, Tappolet. Use of lycode powders for the examination of documents partially written with erasable ball point pen inks[J].Forensic Science International, 1985,28 (2): 115-120.
7Joy T, Kunjappu. Essays in Ink Chemistry [M]. New York: Nova Science Publishers, inc, 2001,22-33.
8Ordway Hilton. Characteristics of erasable ball point pens [J]. Forensic Science International, 1984,26 (4): 269-275.