Columbia subject headings:
Constitutional law--European Union countries.
European Union countries--Politics and government.
Law--European Union countries--Philosophy.
Sovereignty.
Harvard subject headings:
Constitutional law--European Union countries
European Union countries--Politics and government.
European Union--Great Britain.
Law--European Union countries--Philosophy.
Sovereignty.
Princeton subject headings:
Constitutional law--European Union countries.
Law--European Union countries--Philosophy.
Sovereignty.