B. K. Ismaylov, N. F. Zikrillayev, K. A. Ismailov, K. U. Kamalov, and A. K. Saparov, “Investigation of the Influence of Nickel on the Behavior of Thermal Donors in Silicon”, East Eur. J. Phys., no. 3, pp. 449-453, Sep. 2025.