The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "unique" appeared
1999-08-27 : Economic and Monetary Union in Europe - the challenges ahead1998-11-12 : The stability-oriented monetary policy strategy of the European System of Central Banks and the international role of the euro
1998-11-10 : The ESCB's stability-oriented monetary policy strategy