V. L. Popov, M. Popov, and I. A. Lyashenko, “A Simple Approximation for Indentation of Finite Elastic Layers by Parabolic, Conical, and Flat-ended Cylindrical Indenters”, Spec. Mech. Eng. Oper. Res., vol. 3, no. 1, pp. 18–27, Mar. 2026, doi: 10.31181/smeor202650.