J.-F. Debongnie and P. Beckers, “On a general decomposition of the error of an approximate stress field in elasticity”, CAMES, vol. 8, no. 2-3, pp. 261–270, Mar. 2023, Accessed: Jan. 12, 2025. [Online]. Available: https://cames3.ippt.pan.pl/index.php/cames/article/view/1169