https://www.banque-france.fr/sites/default/files/media/2019/04/17/ngfs_first_comprehensive_report_-_17042019_0.pdf
https://www.icij.org/investigations/hidden-treasures/more-than-1000-artifacts-in-metropolitan-museum-of-art-catalog-linked-to-alleged-looting-and-trafficking-figures/
https://pubs.aeaweb.org/doi/pdfplus/10.1257/jep.34.2.172