“Hierarchical Elements, Local Mappings and the $H$-$P$ Version of the Finite Element Method (Ⅱ)”, JCM, vol. 6, no. 2, pp. 142–155, Jun. 1988, Accessed: Feb. 26, 2026. [Online]. Available: https://www.global-sci.com/index.php/JCM/article/view/10908