Columbia subject headings:
Harvard subject headings:
European Union countries--Foreign relations--21st century.
European Union countries--Politics and government--21st century.
Russia--Relations--Ukraine.
Ukraine--Foreign relations--1991-
Ukraine--Politics and government--1991-
Ukraine--Relations--Russia.
Princeton subject headings:
European Union countries--Foreign relations--21st century.
European Union countries--Politics and government--21st century.
Russia--Relations--Ukraine.
Ukraine--Foreign relations--1991-
Ukraine--Politics and government--1991-
Ukraine--Relations--Russia.