@article{ref1,
title="Validity of alcoholics' self-reported drinking history",
journal="Quarterly journal of studies on alcohol",
year="1970",
author="Summers, T.",
volume="31",
number="4",
pages="972-974",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0033-5649",
doi="",
url="http://dx.doi.org/"
}