Yingchun Jiang and  Yan Tang,  Nonstational Dual Wavelet Frames in Sobolev Spaces.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    February 2011, vol. 50(2). 201 - 205
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/7649.