@article{ref1,
title="Basic review of the duties of dental assistants. Ergonomics in dental practice",
journal="Dental Dienst; Fachzeitschrift für den Dental-Markt; technisches Fachblatt für Prothetik.",
year="1972",
author="Holtkamp, P.",
volume="24",
number="8",
pages="3-7",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0011-8559",
doi="",
url="http://dx.doi.org/"
}