1. The load on the lumbar spine in sitting postures;Andersson,1980
2. Trunk muscle forces during seated work;Andersson;Ergonomics,1986
3. Evaluation of office chairs — A validation study;Bishu,1988
4. Behavior, Body mechanics and discomfort;Branton;Ergonomics,1969
5. A field evaluation of office chairs;Burri,1987