Checking Web Accessibility with the Content Accessibility Checker (CAC). - Eduard Klein; Anton Bolfing; Markus Riesch (ICCHP (1), 2014)

PDF Accessibility Checker (PAC 2): The First Tool to Test PDF Documents for PDF/UA Compliance. - Andreas Uebelbacher; Roberto Bianchetti; Markus Riesch (ICCHP (1), 2014)