@article{ref1,
title="Collapse after intravenous injection of hashish",
journal="British medical journal: BMJ",
year="1968",
author="Henderson, A. H. and Pugsley, D. J.",
volume="3",
number="5612",
pages="229-230",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}