@article{ref1,
title="Obstruction at Christmas",
journal="British journal of clinical practice",
year="1991",
author="Houghton, A. D.",
volume="45",
number="4",
pages="295-295",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-0947",
doi="",
url="http://dx.doi.org/"
}