@article{ref1,
title="Smoking and drinking habits of students at the University of Hong Kong: a longitudinal study",
journal="Public health",
year="1976",
author="Bard, S. M. and Peacock, J. B.",
volume="90",
number="5",
pages="219-225",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0033-3506",
doi="",
url="http://dx.doi.org/"
}