* Cauldwell D.O. (2001) "Sex Transmutation – Can One's Sex Be Changed? There's But a Thin Genetic Line Between the Sexes, But the Would-be Sex Transmutee Battles Forces More Stubborn Than the Genes – Reprint der Originalarbeit" noto come: "Sex Transmutation – Can One's Sex Be Changed?, Haldeman-Julius Publications, Girard, Kansas, 1951. Copyright, 1951"