1. Alekseev, I.Yu., Zapyatnennye zvezdy malych mass (Low-Mass Spotted Stars), Odessa: Astroprint, 2001.
2. Alekseev I.Yu. and Kozhevnikova A.V. Long-term variations in the spottedness of BY Dra M dwarfs, Astron. Rep., 2017, vol. 61, no. 3, pp. 221–232.
3. Alekseev, I.Yu. and Bondar’, N.I. Spottedness of the emission-line dwarf stars BF CVn, DT Vir, EQ Vir, and V1396 Cyg from photoelectric and photographic observations, Astron. Lett., 1997, vol. 23, no. 2, pp. 257–262.
4. Argue, A.N., UBV photometry of 300 G and K type stars, Mon. Not. R. Astron. Soc., 1963, vol. 125, pp. 557–570.
5. Baliunas, S.L., Nesme-Ribes, E., Sokoloff, D., and Soon, W.H., A dynamo interpretation of stellar activity cycles, Astrophys. J., 1996, vol. 460, pp. 848–854.