@article{ref1,
title="On the Valuation of the Mechanical Effect of Gradients on a Line of Railroad. [Abstract]",
journal="Abstracts of the papers printed in the Philosophical Transactions of the Royal Society of London",
year="1830",
author="Barlow, Peter",
volume="3",
number="",
pages="390-391",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0365-5695",
doi="",
url="http://dx.doi.org/"
}