
https://wiiw.ac.at/assessing-the-international-interlinkages-and-dependencies-of-the-eu27-energy-renewables-ecosystem-dlp-6897.pdf

https://www.sipri.org/sites/default/files/2026-03/fs_2603_at_2025.pdf

https://theconversation.com/cual-es-el-material-mas-usado-del-mundo-y-el-que-menos-se-investiga-213576