@article{ref1,
title="The chemistry of a toxic constituent of x anthocephalum species",
journal="Annals of the New York Academy of Sciences",
year="1964",
author="Shaver, T. N. and Camp, Bennie J. and Dollahite, J. W.",
volume="111",
number="",
pages="737-743",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0077-8923",
doi="",
url="http://dx.doi.org/"
}