@article{ref1,
title="Heart rate of training captains engaged in different activities",
journal="Aerospace medicine",
year="1970",
author="Bateman, S. C. and Goldsmith, R. and Jackson, K. F. and Smith, H. P. and Mattocks, V. S.",
volume="41",
number="4",
pages="425-429",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}