Langzeitarchivierung mit PDF/A-2 - PDF Standards im Überblick. - Olaf Drümmer; Thomas Zellmann (Inform. Spektrum, 2011)

PDF/UA (ISO 14289-1) - Applying WCAG 2.0 Principles to the World of PDF Documents. - Olaf Drümmer (ICCHP (1), 2012)

Using Layout Applications for Creation of Accessible PDF: Technical and Mental Obstacles When Creating PDF/UA from Adobe Indesign CS 5.5. - Olaf Drümmer (ICCHP (1), 2012)

PDF/UA - A New Era for Document Accessibility: Understanding, Managing and Implementing the ISO Standard PDF/UA (Universal Accessibility): Introduction to the Special Thematic Session. - Olaf Drümmer; Markus Erle (ICCHP (1), 2012)