1. Andriyanova, E.A. and Mochalova, O.A., Water crowfoots blooming in frost, Priroda (Moscow, Russ. Fed.), 2018, no. 4, pp. 24–33.
2. Zhmylev, P.Yu., Karpukhina, E.A., and Zhmyleva, A.P., Secondary flowering: induction and developmental disorder, Zh. Obshch. Biol., 2009, vol. 70, no. 3, pp. 262–272.
3. Iogansen, V.E., Kuznetsov, A.S., and Deev, G.N., Rivers, in Sever Dal’nego Vostoka (North of the Far East), Moscow: Nauka, 1970, pp. 186–188.
4. Klyukin, N.K., Climate. Sever Dal’nego Vostoka (North of the Far East), Moscow: Nauka, 1970, pp. 101–132.
5. Lebedeva, O.A., Features of phenological development of Batrachium kauffmannii (Ranunculaceae) in small rivers of Yaroslavl oblast, Yarosl. Pedagog. Vestn., 2012, vol. III (Estestv. Nauki), no.1, pp. 98–102.