@article{ref1,
title="Physiological position of rest and phoria",
journal="American journal of ophthalmology",
year="1969",
author="Levy, J.",
volume="68",
number="4",
pages="706-713",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9394",
doi="",
url="http://dx.doi.org/"
}