@article{ref1,
title="Colour vision defect after cranial trauma",
journal="Modern problems in ophthalmology",
year="1972",
author="Hansen, E.",
volume="11",
number="",
pages="160-164",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0077-0078",
doi="",
url="http://dx.doi.org/"
}