1. M. I. Andriichuk, N. N. Voitovich, P. A. Savenko, and V. P. Tkachuk, Synthesis of Antennas on the Basis of an Amplitude Directional Pattern. Numerical Methods and Algorithms [in Russian], Naukova Dumka, Kiev (1993).
2. O. O. Bulatsyk, M. M. Voitovych, B. Z. Katsenelenbaum, and Yu. P. Topolyuk, Phase Optimization Problems. Application to the Theory of Wave Fields [in Ukrainian], Naukova Dumka, Kyiv (2012).
3. M. M. Vainberg, Variational Method and the Method of Monotone Operators in the Theory of Nonlinear Equations [in Russian], Nauka, Moscow (1972).
4. M. M. Vainberg, Variational Methods for the Investigation of Nonlinear Operators [in Russian], Gostekhteorizdat, Moscow (1956).
5. Y. Wang, A. S. Leonov, D. V. Lukyanenko, V. D. Shinkarev, and A. G. Yagola, “On phase correction in tomographic research,” Sib. Zh. Industr. Mat., 23, No. 4, 18–29 (2020); 10.33048/SIBJIM.2020.23.402; English translation: J. Appl. Ind. Math., 14, No. 4, 802–810 (2020); https://doi.org/10.1134/S1990478920040171.