1. 2012 www.eurofound.europa.eu/publications/htmlfiles/ef1182.htm
2. 2013 Stress and Psychological Disorders in Great Britain www.hse.gov.uk/statistics/causdis/stress/stress.pdf
3. The relationship between perceived stress and self-reported illness-related absenteeism;Jacobson;American Journal of Health Promotion,1996
4. The consequences of job stress for nurses’ health: time for a check-up;McNeely;Nursing Outlook,2005
5. 2008 Exposure to stress: Occupational hazards in hospitals https://www.cdc.gov/niosh/docs/2008-136/pdfs/2008-136.pdf