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3. F. L. Kogan, “Features of strong excitation control of synchronous generators in a complex power system,” Élektr. Stantsii, No. 7, 27 – 35 (2019).
4. A. A. Yurganov, “Some considerations on the article by F. L. Kogan ‘Features of strong excitation control of synchronous generators in a complex power system’,” Élektr. Stantsii, No. 7, 36 – 37 (2019).
5. F. L. Kogan, “Concerning the article by A. A. Yurganov “Some considerations on the article by F. L. Kogan “Features of strong excitation control of synchronous generators in a complex power system,” Élektr. Stantsii, No. 11, 55 – 60 (2019).