Asri, M. N. M., Desa, W. N. S. M., & Ismail, D. (2015). Fourier Transform Infrared (FTIR) Spectroscopy with Chemometric Techniques for the Classification of Ballpoint Pen Inks. Arab Journal of Forensic Sciences & Forensic Medicine , 1(2). https://doi.org/10.12816/0017699