1. World Health Organization Regional Office for Europe Report on the Health of Refugees and Migrants in the WHO European Region: No Public Health without Refugee and Migrant Healthhttp://www.euro.who.int/en/publications/abstracts/report-on-the-health-of-refugees-and-migrants-in-the-who-european-region-no-public-health-without-refugee-and-migrant-health-2018
2. Population Division. International Migration Report—Highlights ST/ESA/SER, 2017https://www.un.org/development/desa/publications/international-migration-report-2017.html
3. United Nations International Migrant Stock 2017: Graphshttp://www.un.org/en/development/desa/population/migration/data/estimates2/estimatesgraphs.shtml?2g2