1. World Health Organization. (2021, February). COVID-19 global confirmed cases and deaths. https://covid19.who.int/
2. Report on sadness/depression, nervousness/anxiety and sleep problems in the Brazilian adult population during the COVID-19 pandemic;Barros;Epidemiol Serv Saude,2020
3. Mental health, substance use, and suicidal Ideation during the COVID-19 pandemic — United States, June 24–30, 2020;Czeisler;MMWR. Morbid Mortal Wkly Rep,2020
4. Hamblin, J (2020, December 21). The Mysterious Link Between COVID-19 and Sleep. The Atalantic.
5. COVID-19 and mental health: A review of the existing literature;Rajkumar;Asian J Psychiatry,2020