1. Sumption, M., Walsh, P.W. (2022). EU Migration From and to the UK. Migration Observatory Briefing. COMPAS, University of Oxford. https://migrationobservatory.ox.ac.uk/wp-content/uploads/2020/10/MigObs-Briefing-EU-migration-to-and-from-the-UK.pdf.
2. Office for National Statistics (2021). Population of the UK by country of birth and nationality: year ending June 2021. https://www.ons.gov.uk/peoplepopulationandcommunity/populationandmigration/internationalmigration/bulletins/ukpopulationbycountryofbirthandnationality/yearendingjune2021.
3. OECD Statistics. (2001). "OECD Glossary of Statistical Terms - Central and Eastern European Countries (CEECs) Definition". https://stats.oecd.org/glossary/detail.asp?ID=303.
4. A blind spot on the global mental health map: A scoping review of 25 years’ development of mental health care for people with severe mental illness in central and eastern Europe;Winkler;Lancet Psychiatry,2017
5. Mental health care in Eastern Europe and Central Asia:An analysis of needs and a call for greater investment;Hook;Lancet Reg Health Eur,2021