Yan , XiaoqiangQian , XuZhang , HongSong , Songhe and Cheng , Xiujun. (2023). Solving Nonlinear Delay-Differential-Algebraic Equations with Singular Perturbation via Block Boundary Value Methods.
            <i>Journal of Computational Mathematics</i>. <i>41</i> (4).
            643-662.
         doi:10.4208/jcm.2109-m2021-0020