@article{ref1,
title="Traumatic dental injuries in children. Part I. Evaluation of traumatic dental injuries and treatment of injuries to primary teeth",
journal="Update in pediatric dentistry",
year="1989",
author="Johnson, R.",
volume="2",
number="3",
pages="1-4, 6",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0897-876X",
doi="",
url="http://dx.doi.org/"
}