@article{ref1,
title="Correspondence analysis: a graphical technique for examining categorical data",
journal="Nursing research",
year="1997",
author="Watts, D. D.",
volume="46",
number="4",
pages="235-239",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0029-6562",
doi="",
url="http://dx.doi.org/"
}