@article{ref1,
title="Social science theory as a source of hypotheses in epidemiological research",
journal="American journal of public health",
year="1964",
author="Cassel, J.",
volume="54",
number="9",
pages="1482-1488",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}