Amdouni, S. ., Mansouri, K. ., Renard, Y., Arfaoui, M. ., & Moakher, M. . (2012). Numerical convergence and stability of mixed formulation with X-FEM cut-off. European Journal of Computational Mechanics, 21(3-6), 160–173. https://doi.org/10.13052/17797179.2012.714724