M. E. A. Bencheikh Le Hocine and Y. Bellour, “An L2-stability analysis of a θ-scheme for a class of nonlinear parabolic variational inequalities of obstacle type: L2 Stability of a θ-scheme for parabolic PVIs”, J. Innov. Appl. Math. Comput. Sci, vol. 5, no. 2, pp. 371–383, Jan. 2026.