@article{ref1,
title="Mitral valve replacement--a review of five years' experience",
journal="Medical journal of Australia",
year="1969",
author="Windsor, H. M. and Shanahan, M. X.",
volume="1",
number="6",
pages="259-263",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0025-729X",
doi="",
url="http://dx.doi.org/"
}