1. Accident Insurance, I. F. (2008). Ergonomic examination of special office chairs. BGIA Report 5 Sankt Augustin: Institute for Occupational Safety and Health of the German Statutory Accident Insurance.
2. An, M., & Colarelli, S. (2016). Why we need more nature at work: Effects of natural elements and sunlight on mental health and work attitudes. PLoS ONE, 23(5), 1–17.
3. Bergler, R. (2009). Psychology of hygiene. Frankfurt/M.: Steinkopff Publishers.
4. Berger, M. (2012). Position paper of the German society of psychiatry, psychotherapy and neurology (DGPPN) on burnout. Berlin: DGPPN.
5. Bernardi, L., Porta, C., & Casucci, G. (2009). Dynamic interactions between musical, cardiovascular, and cerebral rhythms in humans. Circulation, 119(30), 3171–3180.