Wang liguo and  Wang zongmin and  Kong ying,  A Novel Interpolation Scheme and Apparatus to Extend DAC Usable Spectrum over Nyquist Frequency.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2012, vol. 63(3). 310 - 314
    [viewed 15 October 2019]. Available from: https://publications.waset.org/pdf/1379.