City Twinning, the Great British brand, made in Coventry, 1939-1945

https://www.coventry.gov.uk/info/217/coventry_blitz/2644/coventry_stories_of_peace_and_reconciliation/13

https://www.ntv.ru/novosti/2286362/

https://warwick.ac.uk/fac/soc/ces/research/current/twinning