Benjamin, H. : The Transsexual Phenomenon, 1st ed. Ace Pub. Co., Herefordshire, 1966.
Boswell, H. : The transgender alternative. Chrysalis Quarterly, 1(2) ; 29-31,1991.
Hirschfeld, M.: Transvestites : The Erotic Drive To Cross Dress (1910). Prometheus Books, New York, 2003.
Lev, A.I. : Transgender Emergence : Therapeutic Guidelines for Working with Gender-Variant People and Their Families, 1 edition. Routledge, New York, 2013.