Wu , CongWang , Jinru and Zeng , Xiaochen. (2021). Adaptive and Optimal Point-Wise Estimations for Densities in GARCH-Type Model by Wavelets.
            <i>Journal of Computational Mathematics</i>. <i>40</i> (1).
            108-126.
         doi:10.4208/jcm.2007-m2020-0109