@article{ref1,
title="Sports and genetics. A study on twins (351 pairs)",
journal="Acta geneticae medicae et gemellologiae",
year="1960",
author="Gedda, L.",
volume="9",
number="",
pages="387-406",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-5660",
doi="",
url="http://dx.doi.org/"
}