@article{ref1,
title="How valid are the results of the st. Petersburg–usa orphanage intervention study and what do they mean for the world's children?",
journal="Monographs of the society for research in child development",
year="2008",
author="Crockenberg, Susan C.",
volume="73",
number="3",
pages="263-270",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0037-976X",
doi="10.1111/j.1540-5834.2008.00496.x",
url="http://dx.doi.org/10.1111/j.1540-5834.2008.00496.x"
}