Adaptable User Interfaces for People with Special Needs. - Christian Bühler; Helmut Heck; Rainer Wallbruch (VCHCI, 1993)

A Uniform Control Interface for Various Electronic Aids. - Christian Bühler; Helmut Heck; Rainer Wallbruch (ICCHP, 1994)

User Feed-Back in the Development of an Information System for Public Transport. - Christian Bühler; Helmut Heck; Christian Radek; Rainer Wallbruch; Josef Becker; Claudia Bohner-Degrell (ICCHP (1), 2010)

Definition of "Total Accessibility" for Public Transport. - Christian Bühler; Rainer Wallbruch (AAATE Conf., 2017)

Towards Standardised Information Exchange Regarding the Accessibility of Public Transport in Germany. - Helmut Heck; Rainer Wallbruch (AAATE Conf., 2017)