XrML - eXtensible rights Markup Language. - Xin Wang; Guillermo Lao; Thomas DeMartini; Hari Reddy; Mai Nguyen; Edgar Valenzuela (XML Security, 2002)

Supporting rights checking in an MPEG-21 Digital Item Processing environment. - Frederik De Keukelaere; Thomas DeMartini; Jeroen Bekaert; Rik Van de Walle (ICME, 2005)

The MPEG-21 rights expression language and rights data dictionary. - Xin Wang; Thomas DeMartini; B. Wragg; M. Paramasivam; C. Barlas (IEEE Trans. Multim., 2005)