1. A. Rössle, J. Elasticity 60 (1), 57–75 (2000).
2. A. A. Samarskii, R. D. Lazarov, and V. L. Makarov, Finite Difference Schemes for Differential Equations with Generalized Solutions (Vysshaya Shkola, Moscow, 1987) [in Russian].
3. P. Ciarlet, The Finite Element Method for Elliptic Problems (North-Holland, Amsterdam, 1978; Mir, Moscow, 1980).
4. T. Apel, A.-M. Sändig, and J. R. Whiteman, Math. Methods Appl. Sci. 19 (1), 63–85 (1996).
5. H. Nguyen-Xuan, G. R. Liu, S. Bordas, S. Natarajan, and T. Rabczuk, Comput. Methods Appl. Mech. Eng. 253, 252–273 (2013).