Chumchob , Noppadol and Prakit , Isararat. (2018). An Improved Variational Model and Its Numerical Solutions for Speckle Noise Removal from Real Ultrasound Images.
            <i>Journal of Computational Mathematics</i>. <i>37</i> (2).
            201-239.
         doi:10.4208/jcm.1711-m2015-0477