Columbia subject headings:
Europe--Economic conditions--21st century.
Europe--Economic integration--History--21st century.
Harvard subject headings:
Europe--Economic integration--History--21st century.
European Union--History--21st century.
Eurozone--History--21st century.
Global Financial Crisis, 2008-2009--Political aspects--European Union countries.
Princeton subject headings:
Europe--Economic integration--History--21st century.