@article{ref1,
title="Chewing gum-an unusual clue in a recent homicide investigation",
journal="International journal of orthodontics",
year="1981",
author="Sperber, N. D.",
volume="19",
number="2",
pages="7-8",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0020-7500",
doi="",
url="http://dx.doi.org/"
}