@article{ref1,
title="Transsexualism: considerations regarding sexual reassignment",
journal="Journal of nervous and mental disease",
year="1968",
author="Hoopes, J. E. and Knorr, N. J. and Wolf, S. R.",
volume="147",
number="5",
pages="510-516",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-3018",
doi="",
url="http://dx.doi.org/"
}