@article{ref1,
title="A Note on the Frequency of Skiing Accidents",
journal="Lancet",
year="1929",
author="Knoll, W.",
volume="213",
number="5503",
pages="332-333",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0140-6736",
doi="",
url="http://dx.doi.org/"
}