@article{ref1,
title="The growth and development of four XYY infants",
journal="Pediatrics",
year="1971",
author="Valentine, G. H. and McClelland, M. A. and Sergovich, F. R.",
volume="48",
number="4",
pages="583-594",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-4005",
doi="",
url="http://dx.doi.org/"
}