@article{ref1,
title="Isolation of medicinal substances and drugs from biological material",
journal="Mikrochimica acta",
year="1977",
author="Wawschinek, O. and Petek, W.",
volume="",
number="1-2 Pt 2",
pages="15-23",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0026-3672",
doi="",
url="http://dx.doi.org/"
}