@article{ref1,
title="On the causes of blindness in Switzerland",
journal="Ophthalmologica",
year="1967",
author="Rintelen, F.",
volume="154",
number="3",
pages="223-238",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0030-3755",
doi="",
url="http://dx.doi.org/"
}