@article{ref1,
title="Psychomotor and mental development at four years of age: relation to psychosocial conditions and health. Results from a prospective longitudinal study",
journal="Acta paediatrica - Supplement",
year="1995",
author="Nordberg, L.",
volume="409",
number="",
pages="1-46",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0803-5326",
doi="",
url="http://dx.doi.org/"
}