Jarzębowski, Andrzej, and Jan Maciejewski. “Some Remarks on the Applicability of Rectangular Elements to Plane Strain Boundary Value Problems”. Computer Assisted Methods in Engineering and Science 5, no. 3 (May 31, 2023): 299–309. Accessed January 12, 2025. https://cames3.ippt.pan.pl/index.php/cames/article/view/1346.