@article{ref1,
title="The physiological and evolutionary background of maternal responsiveness",
journal="New directions for child development",
year="1989",
author="Rosenblatt, J. S.",
volume="ePub",
number="43",
pages="15-30",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0195-2269",
doi="",
url="http://dx.doi.org/"
}