Columbia subject headings:
Hybrid warfare--Russia (Federation)
Russia (Federation)--Foreign relations--Ukraine.
Ukraine Conflict, 2014-
Ukraine--Foreign relations--Russia (Federation)
Harvard subject headings:
Hybrid warfare--Russia (Federation)
Russia (Federation)--Foreign relations--Ukraine.
Ukraine Conflict, 2014-
Ukraine--Foreign relations--Russia (Federation)
Princeton subject headings:
Russia (Federation)--Relations--Ukraine--History.
Russia--Relations--Ukraine--History.
Soviet Union--Relations--Ukraine--History.
Ukraine--History, Military.
Ukraine--Relations--Russia (Federation)--History.
Ukraine--Relations--Russia--History.
Ukraine--Relations--Soviet Union--History.