@article{ref1,
title="Electric motors versus compressed-air engines for driving deep-mine hoists",
journal="Transactions of the American Institute of Mining and Metallurgical Engineers",
year="1911",
author="Pauly, K. A.",
volume="42",
number="",
pages="533-560",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="",
issn="0096-4778",
doi="",
url="http://dx.doi.org/"
}