@article{ref1,
title="Causes and types of traumatic tooth injuries treated in a public dental health clinic",
journal="Endodontics and dental traumatology",
year="1987",
author="Oikarinen, K. and Kassila, O.",
volume="3",
number="4",
pages="172-177",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0109-2502",
doi="",
url="http://dx.doi.org/"
}