@article{ref1,
title="A case of thallium poisoning during pregnancy",
journal="Nederlandsch Tijdschrift Voor Verloskunde en Gynaecologie",
year="1959",
author="Sikkel, A. and Posthumus meyes, F. E. and Zondag, H. A.",
volume="59",
number="",
pages="386-394",
abstract="<p>[Abstract unavailable]</p> <p>Language: nl</p>",
language="nl",
issn="0301-2247",
doi="",
url="http://dx.doi.org/"
}