M. Debyeche and  J.P Haton and  A. Houacine,  A New Vector Quantization Front-End Process for Discrete HMM Speech Recognition System.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2007, vol. 6(6). 1627 - 1632
    [viewed 16 October 2019]. Available from: https://publications.waset.org/pdf/2743.