
https://theconversation.com/catalan-euskera-y-gallego-futuras-lenguas-oficiales-de-la-ue-213136

http://wp.unil.ch/space/files/2016/05/SPACE-I-2014-Report_final.1.pdf

https://www.barmer.de/resource/blob/1485604/3f241665fbe6e12f9ad57bd59c4f8222/sinus-studie-jugendbericht-2025-2026-kapitel-zukunftsoptimismus-data.pdf