1.
Ohnimus S, RĂ¼ter M, Stein E. General aspects of Trefftz method and relations to error estimation of finite element approximations. CAMES [Internet]. 2023 Mar. 2 [cited 2025 Jan. 12];8(2-3):425-37. Available from: https://cames3.ippt.pan.pl/index.php/cames/article/view/1180