KOMPIŠ, Vladimír; ŠTIAVNICKY, Mário. Trefftz functions in FEM, BEM and meshless methods. Computer Assisted Methods in Engineering and Science, [S. l.], v. 13, n. 3, p. 417–426, 2006. Disponível em: https://cames.ippt.gov.pl/index.php/cames/article/view/943. Acesso em: 5 mar. 2026.