OHNIMUS, Stephan; RÜTER, Marcus; STEIN, Erwin. General aspects of Trefftz method and relations to error estimation of finite element approximations. Computer Assisted Methods in Engineering and Science, [S.l.], v. 8, n. 2-3, p. 425-437, mar. 2023. ISSN 2956-5839. Available at: <https://cames.ippt.gov.pl/index.php/cames/article/view/1180>. Date accessed: 04 dec. 2024.