Freitas JAT de. Time integration and the Trefftz Method Part II - Second-order and hyperbolic problems. Comp. Assist. Methods Eng. Sci. [Internet]. 2003 Dec. 31 [cited 2026 May 27];10(4):465-77. Available from: http://cames.ippt.gov.pl/index.php/cames/article/view/1058