@article{ref1,
title="Guidelines for examining the driver with visual difficulty",
journal="American journal of ophthalmology",
year="1970",
author="Light, W. O. and Burg, F. D. and Stock, M. S. and Douglass, J. M.",
volume="69",
number="6",
pages="1019-1022",
abstract="Abstract unavailable.",
language="",
issn="0002-9394",
doi="",
url="http://dx.doi.org/"
}