@article{ref1,
title="Severe visual impairment in Swedish children",
journal="Documenta Ophthalmologica",
year="1972",
author="Lindstedt, E.",
volume="31",
number="1",
pages="173-204",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0012-4486",
doi="",
url="http://dx.doi.org/"
}