¹National Plan for Open Science: https://www.enseignementsup-recherche.gouv.fr/sites/default/files/content_migration/document/SO_A4_2018_EN_01_leger_982501.pdf

²Unpaywall is an online open-source software. Its goal is to build a database that distributes open access publications from more than 50,000 publishers and open archives. In Unpaywall, you can find open access versions of scientific publications that are usually paywalled. Unpaywall offers extensions on Google Chrome or Firefox.