@article{ref1,
title="Emerging technologies: webcams and crowd-sourcing to identify active transportation",
journal="American journal of preventive medicine",
year="2013",
author="Hipp, J. Aaron and Adlakha, Deepti and Eyler, Amy A. and Chang, Bill and Pless, Robert",
volume="44",
number="1",
pages="96-97",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0749-3797",
doi="10.1016/j.amepre.2012.09.051",
url="http://dx.doi.org/10.1016/j.amepre.2012.09.051"
}