New Ways of Sharing and Using Authority Information: The LEAF Project. - Max Kaiser; Hans-Jörg Lieder; Kurt Majcen; Heribert Vallan (D Lib Mag., 2003)

Reference models for digital libraries: actors and roles. - José Borbinha; John A. Kunze; Angela Spinazzè; Peter Mutschke; Hans-Jörg Lieder; Michael Mabe; Larry Dixson; Howard Besser; Becky Dean; Warwick Cathro (Int. J. Digit. Libr., 2005)