1. Rapporto: Imprese Aperte Lavoratori Protetti;Torino,2020
2. Municipal Waste Report—Edition 2019—Summary Data;Frittelloni,2019
3. Wearing Face Masks Outside during the Coronavirus Pandemic in Europe 2020, by Countryhttps://www.statista.com/statistics/1114375/wearing-a-face-mask-outside-in-european-countries/
4. Asians Still Most Likely to Wear Face Masks Due to COVID-19https://www.statista.com/chart/21452/share-of-people-wearing-face-masks-per-country-covid-19/
5. Covid-19: Insights on Face Mask Use—Global Review,2020