Conference ProceedingsRaman Spectroscopy of Blue Ballpoint Pen Inks and Dyes Found in Inks: Investigation of the Effects of Varying Laser WavelengthPresenting section:Questioned Documents2011Yiwen, Luo, ShangHai CHINA; Che, Xu, ShangHai CHINA; Xu, Yang, ShangHai CHINA; Qiran, Sun, ShangHai CHINAView the paperQuestioned Documents