@article{ref1,
title="Active transportation to school: findings from a national survey",
journal="Research quarterly for exercise and sport",
year="2005",
author="Caspersen, C. J. and Yore, Michelle M. and Shisler, Jessica L. and Fulton, Janet E.",
volume="76",
number="3",
pages="352-357",
abstract="Abstract unavailable. Research Note.",
language="",
issn="0270-1367",
doi="",
url="http://dx.doi.org/"
}