@article{ref1,
title="The effect of thermal toughening on the impact resistance of simulated safety lenses",
journal="Investigative ophthalmology",
year="1971",
author="Wigglesworth, E. C.",
volume="10",
number="12",
pages="992-999",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0020-9988",
doi="",
url="http://dx.doi.org/"
}