A. Likéné, A. Zarma, D. Ongodo, J. M. Ema’a Ema’a, P. Abiama, and G. Ben-Bolie, “Effects of Gravitational Field of a Topological Defect on Statistical Properties of Heavy Quark-Antiquark Systems”, East Eur. J. Phys., no. 3, pp. 129-141, Sep. 2022.