@article{ref1,
title="A practical guide to assisted operating. 1. Principles of assisted operating",
journal="British dental journal",
year="1972",
author="Paul, E.",
volume="133",
number="6",
pages="258-261",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-0610",
doi="10.1038/sj.bdj.4802895",
url="http://dx.doi.org/10.1038/sj.bdj.4802895"
}