@article{ref1,
title="The influence of age on the speed of accommodation",
journal="American journal of optometry and archives of American Academy of Optometry",
year="1956",
author="Allen, M. J.",
volume="33",
number="4",
pages="201-208",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9408",
doi="",
url="http://dx.doi.org/"
}