Maher Kh. Hussien, and Fawziya Mahmood Ramo. “Facial Expression Using Histogram of Oriented Gradients and Ensemble Classifier”. Tikrit Journal of Pure Science 27, no. 2 (November 30, 2022): 52–56. Accessed February 9, 2026. https://tjpsj.org/index.php/tjps/article/view/67.