Wan Azani Mustafa, Haniza Yazid, Aimi Salihah Abdul-Nasir, and Mastura Jaafar. “An Illumination Normalization on Face Images: A Comparative Review”. Journal of Advanced Research Design, vol. 35, no. 1, Sept. 2023, pp. 1-9, https://akademiabaru.com/submit/index.php/ard/article/view/4825.