1. Allard, H. A. Response of the woody plantsHibiscus syriacus, Malvaviscus conzattii andBuginvillea glabra to length of day. Jour. Agr. Res.51: 27–341 1935.
2. Bogdanoff, P. L. Photoperiodism in species of woody plants: preliminary contribution. Mitt. Staatsinst. Wiss. Forsch. U. Holzind. 21–55. 1931.
3. Cajlachjan, M. Ch. Yarovization of plants by the action of light. Compt. Rend. Acad. Sci. U. R. S. S.5: 224–229. 1933.
4. —. On the mechanism of photoperiodic reaction. Compt. Rend. (Doklady) Acad. Sci. U. R. S. S.1(10): 89–93. 1936.
5. —. On the hormonal theory of plant development. Compt. Rend. (Doklady) Acad. Sci. U. R. S. S.3(13): 443–447. 1936.