@article{ref1,
title="Some factors predisposing to injuries of permanent incisors in school children",
journal="British dental journal",
year="1973",
author="O'Mullane, D. M.",
volume="134",
number="8",
pages="328-332",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-0610",
doi="",
url="http://dx.doi.org/"
}