
https://www.brookings.edu/blog/education-plus-development/2020/04/29/the-covid-19-cost-of-school-closures/

https://www.ademe.fr/sites/default/files/assets/documents/enquete-tremi-2017-010422.pdf

https://www.vatican.va/content/leo-xiii/en/encyclicals/documents/hf_l-xiii_enc_15051891_rerum-novarum.html