@article{ref1,
title="Adolescence: historic evolution",
journal="Anales Espanoles de Pediatria",
year="1991",
author="Sánchez Villares, E.",
volume="35",
number="Suppl 46",
pages="57-62",
abstract="<p>[Abstract unavailable]</p> <p>Language: es</p>",
language="es",
issn="0302-4342",
doi="",
url="http://dx.doi.org/"
}