12. Bauer W., Wittig T. (1998). “Influence of screen and copy holder positions on head posture, muscle activity and user judgement”. Applied ergonomics, 129, pp185-192.

12. Bauer W., Wittig T. (1998). “Influence of screen and copy holder positions on head posture, muscle activity and user judgement”. Applied ergonomics, 129, pp185-192.