E. A. Ward Maunder and J. P. Moitiniho de Almeida, “Hybrid-equilibrium elements with control of spurious kinematic modes”, CAMES, vol. 4, no. 3-4, pp. 587–605, Jun. 2023, Accessed: Jan. 12, 2025. [Online]. Available: https://cames3.ippt.pan.pl/index.php/cames/article/view/1393