@article{ref1,
title="A questionnaire for the assessment of leisure time physical activities",
journal="Journal of chronic diseases",
year="1978",
author="Taylor, Henry L. and Jacobs, D. R. and Schucker, B. and Knudsen, J. and Leon, A. S. and Debacker, G.",
volume="31",
number="12",
pages="741-755",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0021-9681",
doi="",
url="http://dx.doi.org/"
}