@article{ref1,
title="Drug therapy of pain",
journal="Medizinische Welt",
year="1964",
author="Lendle, L.",
volume="14",
number="",
pages="727-736",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0025-8512",
doi="",
url="http://dx.doi.org/"
}