WASET
    S. Kherchaoui and  A. Houacine,  Curvelet Features with Mouth and Face Edge Ratios for Facial Expression Identification.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2014, vol. 90(6). 954 - 956
    [viewed 05 May 2024]. Available from: https://publications.waset.org/pdf/9998501.