1. Försäkringskassan. Socialförsäkringen i siffror 2013 (In Swedish). Stockholm: Danagård LiTHO; 2013.
2. Waddell G , Burton AK . Is work good for your health and well-being? United Kingdom: The Stationary Office (TCO); 2006.
3. Return to work following vocational rehabilitation for neck, back and shoulder problems: Risk factors reviewed;Selander;Disabil Rehabil,2002
4. Toomingas A , Mathiassen SE , Tornqvist EW . Arbetslivsfysiologi (In Swedish) Lund: Studentlitteratur AB; 2008.
5. The ageing workforce - challenges for occupational health;Ilmarinen;Occup Medicine,2006