1. The Treaty of Lisbon—Fact Sheets on the European Union URL
http://www.europarl.europa.eu/factsheets/en/sheet/5/the-treaty-of-lisbon
2. Psychosocial Risks and Stress at Work
https://osha.europa.eu/en/themes/psychosocial-risks-and-stress
3. Psychosocial Risks in Europe: Prevalence and Strategies for Prevention,2014
4. Promoting Health and Safety in European Small and Medum-Sized Enterprises (SMEs),2005
5. Improving the Business Environment for SMEs through Effective Regulation
https://www.oecd.org/cfe/smes/ministerial/documents/2018-SME-Ministerial-Conference-Parallel-Session-1.pdf