1. Listings of WHO’s response to COVID-19 (In Russ.). https://www.who.int/ru/news/item/29-06-2020-covidtimeline
2. History of investigation and current classification of coronaviruses (Nidovirales: Coronaviridae)
3. Defining Post-COVID Symptoms (Post-Acute COVID, Long COVID, Persistent Post-COVID): An Integrative Classification
4. Recommendations to support self-rehabilitation after illness caused by COVID-19. World Health Organization, Regional Office for Europe. 2020;28. (In Russ.). https://mediker.kz/covid-19/100129/
5. Prilutskii AS. Coronavirus disease 2019. Part 1: coronavirus characteristic, epidemiological features. Vestnik of Hygiene and Epidemiology. 2020;24(1):77-86. (In Russ.)