Waszczyszyn, Zenon, and Ewa Pabisek. “Hybrid NN FEM Analysis of the Elastoplastic Plane Stress Problem”. Computer Assisted Methods in Engineering and Science 6, no. 2 (June 30, 1999): 177–188. Accessed March 5, 2026. https://cames.ippt.gov.pl/index.php/cames/article/view/1316.