Hall, G. Stanley. Adolescence. N.Y., 1907. Vol. II, pp. 561-2.

[20.]

Morgan, T.H. Heredity and Sex. N.Y., 1913, pp. 155f.

[21.]

Lillie, F.R. Theory of the Free Martin. Science, n.s., Vol. XLIII, pp. 611-13.

[22.]

Neugebauer, F.L. Hermaphrodismus, Leipzig, 1908.