@article{ref1,
title="Perineal trauma",
journal="Anales Espanoles de Pediatria",
year="1977",
author="González Landa, G. and Navarro de la Calzada, C. and Ruiz Ferrándiz, U.",
volume="10",
number="8-9",
pages="615-620",
abstract="<p>[Abstract unavailable]</p><p>Language: es</p>",
language="es",
issn="0302-4342",
doi="",
url="http://dx.doi.org/"
}