@article{ref1,
title="On arthropod defense substances. XLIV. Steroids of the mudswimmer Ilybius fenestratus, 3",
journal="Zeitschrift für Naturforschung. Teil B: Chemie, Biochemie, Biophysik, Biologie",
year="1969",
author="Schildknecht, H. and Birringer, H.",
volume="24",
number="12",
pages="1529-1534",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-3174",
doi="",
url="http://dx.doi.org/"
}