Kumar, Dr. Kapil, and Dr. Shobhana Menon. “Determination of Relative Age of Inkjet and Laser Printouts by CIE L*a*b* Color Space”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 31, no. 2, Feb. 2017, pp. 226-3, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/6873.