@article{ref1,
title="Effects of fathers' absence and birth order on aggressive behavior of young male children",
journal="Psychological reports",
year="1979",
author="Boone, S. L.",
volume="44",
number="3 ",
pages="1223-1229",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0033-2941",
doi="",
url="http://dx.doi.org/"
}