@article{ref1,
title="Longitudinal studies on alcoholism: three proposals",
journal="Alcoholism: clinical and experimental research",
year="1977",
author="Lester, David",
volume="1",
number="3",
pages="249-250",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0145-6008",
doi="",
url="http://dx.doi.org/"
}