1. Aksenova, N.P., Bavrina, T.V., and Konstantinova, T.N., Tsvetenie i ego fotoperiodicheskaya regulyatsiya (Flowering and Its Photoperiodic Regulation), Moscow: Nauka, 1973.
2. Chailakhyan, M.Kh., Regulyatsiya tsveteniya vysshikh rastenii (Regulation of Flowering in Higher Plants), Moscow: Nauka, 1988.
3. Drozdov, S.N., Kuretz, V.K., and Titov, A.F., Termorezistentnosts’ aktivno vegetiruyushchikh rastenii (Thermoresistance of Actively Growing Plants), Leningrad: Nauka, 1984.
4. Fiziologiya sels’skokhozyaistvennykh rastenii (Physiology of Cultured Plants), Rubin, B.A., Ed., Moscow: Mosk. Gos. Univ., 1970, vol. 6.
5. Garner, W.W. and Allard, H.A., Effect of the Relative Length of Day and Night and Other Factors of the Environment on Growth and Reproduction in Plants, J. Agric. Res., 1920, vol. 18, pp. 553–609.