Rymarczyk, Tomasz, and Jan Sikora. “SINGULAR INTEGRATION IN BOUNDARY ELEMENT METHOD FOR HELMHOLTZ EQUATION FORMULATED IN FREQUENCY DOMAIN”. Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska 11, no. 4 (December 20, 2021): 4-8. Accessed December 4, 2022. https://ph.pollub.pl/index.php/iapgos/article/view/2836.