@article{ref1,
title="Visual coding using flashing lights",
journal="Human factors",
year="1967",
author="Lamb, J. C. and Goldstein, Daniel A.",
volume="9",
number="5",
pages="405-408",
abstract="Abstract unavailable.",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}