public static function printPapers(Paper $publication)
 {
     $html = "<tr>";
     $html .= "<td class='name-paper'>" . $publication->title() . "</td>";
     $html .= "<td>";
     $html .= "<a target='_blank' href='" . LinkController::getBaseURL() . "/publicacao/" . $publication->getSimpleFilename() . "'>";
     $html .= "<img class='pdf' title='puclicação' alt='pdf' src='" . LinkController::getBaseURL() . "/images/pdf-icon.jpg'/>";
     $html .= "</a>";
     $html .= "</td>";
     $html .= "</tr>";
     echo $html;
 }