https://www.unesco.org/en/articles/celebrating-software-source-code-digital-heritage
https://www.unesco.org/es/articles/situar-el-codigo-fuente-de-software-como-patrimonio-digital-para-el-desarrollo-sostenible
https://webarchive.unesco.org/web/20210404161138/https://en.unesco.org/freeandopensourcesoftware
https://www.softwareheritage.org/
https://archive.softwareheritage.org/