Cheng , Qing and Wang , Cheng. (2021). Error Estimate of a Second Order Accurate Scalar Auxiliary Variable (SAV) Numerical Method for the Epitaxial Thin Film Equation.
            <i>Advances in Applied Mathematics and Mechanics</i>. <i>13</i> (6).
            1318-1354.
         doi:10.4208/aamm.OA-2020-0297