@article{ref1,
title="Energy expenditure during stepping",
journal="British journal of social medicine",
year="1950",
author="Passmore, R. and Thompson, J. G.",
volume="4",
number="4",
pages="234-237",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0366-0842",
doi="",
url="http://dx.doi.org/"
}