REUTSKIY, Sergiy; TIROZZI, Brunello. Trefftz spectral method for elliptic equations of general type. Computer Assisted Methods in Engineering and Science, [S.l.], v. 8, n. 4, p. 629-644, mar. 2023. ISSN 2956-5839. Available at: <https://cames.ippt.pan.pl/index.php/cames/article/view/1164>. Date accessed: 23 dec. 2024.