https://www.piie.com/sites/default/files/documents/wp22-12.pdf
https://www.ifri.org/sites/default/files/atoms/files/levystone_connectivite_asie_centrale_2022_.pdf
https://www.nature.com/articles/d41586-023-00978-2?utm_source=Nature+Briefing&utm_campaign=f1fe2b3b43-briefing-dy-20230414&utm_medium=email&utm_term=0_c9dfd39373-f1fe2b3b43-45594622
http://www.cer.org.uk/sites/default/files/pb_eurasian_IB_16.3.17_0.pdf