Fatal error: Uncaught Error: Undefined constant "autor" in /homepages/7/d417307085/htdocs/profesordeinformatica/principio.inc:38 Stack trace: #0 /homepages/7/d417307085/htdocs/profesordeinformatica/index.php(1): include() #1 {main} thrown in /homepages/7/d417307085/htdocs/profesordeinformatica/principio.inc on line 38