Using Spatial Audio for the Enhanced Presentation of Synthesized Speech within Screen-Readers for Blind Computer Users. - Kai Crispien; Wolfgang Würz; Gerhard Weber 002 (ICCHP, 1994)

A Generic Direct-Manipulation 3D-Auditory Environment for Hierarchical Navigation in Non-Visual Interaction. - Anthony Savidis; Constantine Stephanidis; Andreas Korte; Kai Crispien; Klaus Fellbaum (International ACM Conference on Assistive Technologies, 1996)