Kita, Eisuke, Norio Kamiya, and Youichi Ikeda. 2023. “First- and Second-Order Sensitivity Analysis Schemes by Collocation-Type Trefftz Method”. Computer Assisted Methods in Engineering and Science 4 (3-4): 477-89. https://cames3.ippt.pan.pl/index.php/cames/article/view/1384.