@article{ref1,
title="Accommodative tracking: a trial-and-error function",
journal="Vision research",
year="1964",
author="Troelstra, A. and Zuber, B. L. and Miller, D. and Stark, L.",
volume="4",
number="11",
pages="585-594",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0042-6989",
doi="",
url="http://dx.doi.org/"
}