@article{ref1,
title="The impact of physical-physiological activity on infants' growth and development",
journal="Nursing research",
year="1972",
author="Porter, L. S.",
volume="21",
number="3",
pages="210-219",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0029-6562",
doi="",
url="http://dx.doi.org/"
}