D. N. . Mustaqimah and A. P. Roswiem, “Identification of Gelatin in Dental Materials using the Combination of Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy (ATR-FTIR) and Chemometrics”, Int.J.Halal.Res, vol. 2, no. 1, pp. 1–15, Jun. 2020.