Columbia subject headings:
European Union countries--Foreign relations--21st century.
European Union countries--Politics and government.
Russia (Federation)--Foreign relations--Ukraine.
Russia (Federation)--Foreign relations.
Russia (Federation)--Politics and government--1991-
Ukraine Conflict, 2014-
Ukraine--Foreign relations--Russia (Federation)
Ukraine--Politics and government--1991-
Harvard subject headings:
European Union countries--Foreign relations--21st century.
European Union countries--Politics and government.
Russia (Federation)--Foreign relations--Ukraine.
Russia (Federation)--Foreign relations.
Russia (Federation)--Politics and government--1991-
Ukraine Conflict, 2014-
Ukraine--Foreign relations--Russia (Federation)
Ukraine--Politics and government--1991-
Princeton subject headings:
European Union countries--Foreign relations--21st century.
European Union countries--Politics and government.
Russia (Federation)--Foreign relations--Ukraine.
Russia (Federation)--Foreign relations.
Russia (Federation)--Politics and government--1991-
Ukraine Conflict, 2014-
Ukraine--Foreign relations--Russia (Federation).
Ukraine--Politics and government--1991-