Gu , Dong-QinZhang , Chao and Wang , Zhong-Qing. (2020). ADI-Spectral Collocation Methods for Two-Dimensional Parabolic Equations.
            <i>East Asian Journal on Applied Mathematics</i>. <i>10</i> (2).
            399-419.
         doi:10.4208/eajam.300819.271019