1. N. I. Alekseevskii, N. L. Frolova, M. M. Antonova, and M. I. Igonina, “Climate Change Impact on the Regime and Runoff of the Volga Basin Rivers,” Voda: Khimiya i Ekologiya, No. 4 (2013) [in Russian].
2. M. V. Bolgov, “Assessment of Hydrological and Water Management Characteristics under Conditions of Uncertainty of the Formation Factors,” Vodnoe Khozyaistvo Rossii, No. 4 (2016) [in Russian].
3. M. V. Bolgov, E. A. Korobkina, M. D. Trubetskova, M. K. Filimonova, and I. A. Filippova, “Present-day Variations of the Minimum Runoff of the Volga Basin Rivers,” Meteorol. Gidrol., No. 3 (2014) [Russ. Meteorol. Hydrol., No. 3, 39 (2014)].
4. M. V. Bolgov and N. E. Sentsova, “Bayesian Assessments of Design Characteristics of the Minimum River Runoff under Nonstationary Conditions,” Meteorol. Gidrol., No. 11 (2010) [Russ. Meteorol. Hydrol., No. 11, 35 (2010)].
5. M. V. Bolgov, I. A. Filippova, N. V. Osipova, E. A. Korobkina, and M. D. Trubetskova, “Modern Features of Hydrological Regime for the Volga Basin Rivers,” in Issues of Geography. Russian Geographic Society (Kodeks, Moscow, 2018) [in Russian].