Saragih, R. A., D. Sudiana, and D. Gunawan. “Combination of DFT As Global Face Descriptor and LBP/LDiP/LDNP As Local Face Descriptor for Face Recognition”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 10, no. 1-9, Feb. 2018, pp. 99-102, https://jtec.utem.edu.my/jtec/article/view/3884.