@article{ref1,
title="Doping control",
journal="Pharmaceutisch Weekblad voor Nederland",
year="1972",
author="Vree, T. B.",
volume="107",
number="45",
pages="687-690",
abstract="<p>[Abstract unavailable]</p><p>Language: nl</p>",
language="nl",
issn="0031-6911",
doi="",
url="http://dx.doi.org/"
}