@article{ref1,
title="Denver test -- diagnostic test of psychomotor development of the child",
journal="Problemy Medycyny Wieku rozwojowego",
year="1973",
author="Slenzak, J. and Michalowicz, R.",
volume="3",
number="",
pages="47-76",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0303-2264",
doi="",
url="http://dx.doi.org/"
}