Gao , Guang-Hua and Liu , Rui. (2019). A Compact Difference Scheme for Fourth-Order Temporal Multi-Term Fractional Wave Equations and Maximum Error Estimates.
            <i>East Asian Journal on Applied Mathematics</i>. <i>9</i> (4).
            703-722.
         doi:10.4208/eajam.171118.060119