1. I. A. Alov, Transactions of the Khabarovsk Medical Institute, Collection 15, 31–43 (1957). In Russian.
2. I. D. Rikhter, Special Histophysiological Features of the Mucous Membrane of the Genital Tract in Female Rats and Mice. Author's Abstract of Dissertation for Doctorate (1949). In Russian.
3. B. Zondek, The Hormones of the Ovary and the Anterior Lobe of the Pituitary (Russian Translation) Moscow (1938).
4. N. A. Shereshevskii, O. A. Steppun and A. V. Rumiantsev, The Basis of Endocrinology, Moscow-Leningrad (1936). In Russian.
5. W. S. Bullough, Biological Sc. v. 231, 453–516 (1946).