Warning: XSLTProcessor::transformToXml() [xsltprocessor.transformtoxml]: I/O warning : failed to load external entity "file:////srv/scielo/www/bases/xml/sc/v17n3/2306-2495-sc-17-03-64.xml" in /srv-new/scielo/www/htdocs/class.XSLTransformerPHP5.php on line 36 Acuerdos de complementación económica en la era digital