https://www.eeas.europa.eu/eeas/ukraine-statement-high-representative-josep-borrell-illegal-%E2%80%9Creferenda%E2%80%9D-luhansk-kherson-and_en
https://theconversation.com/how-maps-are-used-and-abused-in-times-of-conflict-227077
https://pubs.aeaweb.org/doi/pdfplus/10.1257/jep.37.1.3