@article{ref1,
title="Diving into the unknown",
journal="British medical journal: BMJ",
year="1991",
author="Grundy, D. and Penny, P. and Graham, L.",
volume="302",
number="6778",
pages="670-671",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}