Pluymers, Bert, Caroline Vanmaele, Wim Desmet, and Dirk Vandepitte. 2022. “Application of a Hybrid Finite Element-Trefftz Approach for Acoustic Analysis”. Computer Assisted Methods in Engineering and Science 13 (3): 427-44. https://cames3.ippt.pan.pl/index.php/cames/article/view/944.