Ju-Hong Lee and  Yi-Lin Shieh,  Design of Two-Channel Quadrature Mirror Filter Banks Using Digital All-Pass Filters.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2013, vol. 82(10). 1292 - 1297
    [viewed 17 February 2020]. Available from: https://publications.waset.org/pdf/17055.