Moscow(6), Kharkiv, Saint Petersburg(2), Tuapse, Leipzig, Dubna, Krasnodar, Haarlem, Warsaw, Yekaterinburg(3), Frankfurt am Main(2), Novosibirsk(2), Budapest, Kaunas, Arkhangelsk, Campinas, Udon Thani(2), Falkenstein, Zaporizhzhya, Nizhny Tagil, Chisinau, Ljubljana, Navapolatsk, Yerevan(2), Omsk.