Liao , Shijun and Qin , Shijie. (2022). Ultra-Chaos: An Insurmountable Objective Obstacle of Reproducibility and Replication.
            <i>Advances in Applied Mathematics and Mechanics</i>. <i>14</i> (4).
            799-815.
         doi:10.4208/aamm.OA-2021-0364