@article{ref1,
title="Skeletal age and physical development of 12-year-old boys",
journal="Archives Belges de Medecine Sociale, Hygiene, Medecine du Travail et Medecine Legale",
year="1972",
author="Beunen, G. and Ostyn, M. and Renson, R. and Simons, J. and Swalus, P. and van Gerven, D. and Willems, E. J.",
volume="30",
number="2",
pages="102-119",
abstract="<p>[Abstract unavailable]</p><p>Language: nl</p>",
language="nl",
issn="0003-9578",
doi="",
url="http://dx.doi.org/"
}