Chahine, Elie, Patrick Laborde, and Yves Renard. “Spider XFEM, an Extended Finite Element Variant for Partially Unknown Crack-Tip Displacement”. European Journal of Computational Mechanics 17, no. 5-7 (June 11, 2008): 625–636. Accessed April 27, 2026. https://journals.riverpublishers.com/index.php/EJCM/article/view/1819.