@article{ref1,
title="Hippus of the pupil: periods of slow oscillations of unknown origin",
journal="Vision research",
year="1971",
author="Bouma, H. and Baghuis, L. C.",
volume="11",
number="11",
pages="1345-1351",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0042-6989",
doi="",
url="http://dx.doi.org/"
}