1. WHO. WHO | SARS (Severe Acute Respiratory Syndrome). Who.int. https://www.who.int/ith/diseases/sars/en/.
2. Managing Epidemics: Key Facts About Major Deadly Diseases;Health Organization,2018
3. JOHNS HOPKINS, CORONAVIRUS RESOURCE CENTER, COVID-19 Dashboard by the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University (JHU), https://coronavirus.jhu.edu/map.html
4. UNESCO, Education: From disruption to recovery, https://en.unesco.org/covid19/educationresponse
5. World Education Blog. Covid-19: How is Greece coping with school closure. 2020. https://gemreportunesco.wordpress.com/2020/04/14/covid-19-how-is-greece-coping-with-school-closure/