Qianqian Chu, Guanghui Jin, Jihong Shen & Yuanfeng Jin. (2021). Numerical Analysis of Crank-Nicolson Scheme for the Allen-Cahn Equation.
            <i>Journal of Computational Mathematics</i>. <i>39</i> (5).
            655-665.
         doi:10.4208/jcm.2002-m2019-0213