WASET
    Mehran Yazdi and  Mehdi Seyfi and  Amirhossein Rafati and  Meghdad Asadi,  Realtime Lip Contour Tracking For Audio-Visual Speech Recognition Applications.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2008, vol. 16(4). 611 - 614
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/4802.