Khadijat T. Bamigbade and Olufade F. W. Onifade, Improved Feature Extraction Technique for Handling Occlusion in Automatic Facial Expression Recognition. journal = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology. March 2019, vol. 148(4). 218 - 221 [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10010270.