@article{ref1,
title="The problem with the replacement of copper pennies by aluminum pennies",
journal="Pediatrics",
year="1974",
author="Heller, R. M. and Reichelderfer, T. E. and Dorst, J. P. and Oh, Kang-Seob",
volume="54",
number="6",
pages="684-688",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-4005",
doi="",
url="http://dx.doi.org/"
}