Gontarz, Jakub, and Jerzy Podgórski. “Simulation of Four-Point Beam Bending Test Using the X-FEM Method”. Budownictwo i Architektura 19, no. 3 (September 30, 2020): 053-062. Accessed August 9, 2022. https://ph.pollub.pl/index.php/bia/article/view/2143.