@article{ref1,
title="A sensory-motor context affecting performance in a conservation task: a closer analogue of reversibility than empirical return",
journal="Child development",
year="1972",
author="Schnall, M. and Alter, E. and Swanlund, T. and Schweitzer, T.",
volume="43",
number="3",
pages="1012-1023",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0009-3920",
doi="",
url="http://dx.doi.org/"
}