http://intsse.com/wswspdf/en/articles/2019/02/15/zucm-f15.pdf
http://www.ebrd.com/cs/Satellite?c=Content&cid=1395272118012&d=&pagename=EBRD%2FContent%2FDownloadDocument
https://cepr.net/wp-content/uploads/2022/10/Long-Sune-2022-PDF.pdf
https://www.ohchr.org/Documents/Issues/Poverty/EOM_GB_16Nov2018.pdf