1. The Covid-19 Crisis and Clean Energy Progresshttps://www.iea.org/reports/the-covid-19-crisis-and-clean-energy-progress
2. Gas 2020 Analysing the Impact of the Covid-19 Pandemic on Global Natural Gas Marketshttps://www.iea.org/reports/gas-2020
3. WHO Timeline—COVID-19https://www.who.int/news-room/detail/27-04-2020-who-timeline---covid-19
4. Sectoral Evolution of Electricity Demand in Large Consumershttps://www.ree.es/sites/default/files/01_ACTIVIDADES/Documentos/IRE/InfomenIRE_Abr20.pdf
5. ESIOSwww.esios.ree.es/es