Wang , HuiZhu , Chungang and Li , Caiyun. (2019). The Design of Bézier Surface Through Quintic Bézier Asymptotic Quadrilateral.
            <i>Journal of Computational Mathematics</i>. <i>37</i> (5).
            721-738.
         doi:10.4208/jcm.1809-m2016-0761