1. Bernsen NO, Dybkjær H, Dybkjær L (1998) Designing Interactive Speech Systems: From First Ideas to User Testing. Springer, Berlin
2. Blauert J, Jekosch U (2007) Auditory quality of performance spaces for music – The problem of the references. In: Proc. 19th Int. Congress on Acoustics (ICA 2007), Madrid
3. DIN 55350 Partl 11 (1987) Begriffe zur Qualitätssicherung und Statistik. Grundbegriffe der Qualitätssicherung. Deutsches Institut für Normung, Beuth Verlag, Berlin
4. ISO Standard 9241 Part 11 (1999) Ergonomic Requirements for Office Work with Visual Display Terminals (VDTs). Part 11: Guidance on Usability. International Organization for Standardization, Geneva
5. ISO Standard 9241 Part 210 (2010) Ergonomics of Human-system Interaction – Part 210: Human centred Design for Interactive Systems (Formerly Known as 13407). International Organization for Standardization, Geneva