B. Moore, S. Dorrel, C. Halpern, and J. Fernandez. chapter The ergonomic evaluation of several chairs: a case
study, page 267-274. Taylor & Francis, London, (1992)From Jung, 2005.
A. Kilbom, E. Lagerlof, M. Liew, and E. Brobergf. chapter ergonomic study of notified cases of occupational
musculoskeletal disease, page 44-53. Taylor & Francis, London, (1986)