1. Kemp, S.: The digital 2021 global overview report (2021)
2. Facebook. Facebook: company info (2022)
3. Facebook. Facebook: number of monthly active users worldwide 2008–2022 (2022)
4. Tankovska, H.: Twitter: number of monthly active users 2010–2019 (2021)
5. www.internetlivestats.com. Twitter usage statistics (2020)