Oliven, John F. (1965). "Sexual Hygiene and Pathology". The American Journal of the Medical Sciences. 250 (2): 235. doi:10.1097/00000441-196508000-00054.: "Where the compulsive urge reaches beyond female vestments, and becomes an urge for gender ("sex") change, transvestism becomes "transsexualism." The term is misleading; actually, "transgenderism" is what is meant, because sexuality is not a major factor in primary transvestism. Psychologically, the transsexual often differs from the simple cross-dresser; he is conscious at all times of a strong desire to be a woman, and the urge can be truly consuming.", p. 514
