@article{ref1,
title="Reaction time and effect of Ritalin on children with learning problems",
journal="Perceptual and motor skills",
year="1973",
author="Spring, C. and Greenberg, L. and Scott, J. and Hopwood, J.",
volume="36",
number="1",
pages="75-82",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-5125",
doi="",
url="http://dx.doi.org/"
}