København, København, Denmark
Poznan, Greater Poland, Poland
Obninsk, Kaluga, Russia
London, United Kingdom of Great Britain and Northern Ireland
Poznań, wielkopolskie, Poland
Vienna, Vienna, Austria
Yuzhno-sakhalinsk, Sakhalin, Russian Federation
Laukaa, Central Finland, Finland
Ostrava, Moravian-Silesian Region, Czech Republic
Poznań, Greater Poland Voivodeship, Poland
