1. Prevalence of age-related hearing loss in Europe: a review
2. World Health Organisation. Deafness Prevention. https://www.who.int/deafness/estimates/en/
3. Action on Hearing Loss. 2015. Hearing matters. https://actiononhearingloss.org.uk/wp-content/uploads/2020/05/Hearing-Matters-Report.pdf.
4. United Nations. International Day of Sign Languages. https://www.un.org/en/observances/sign-languages-day.
5. Mental health of deaf people