The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "immediately" appeared
2001-11-23 : The ECB and the accession process2000-11-02 : First ECB Central Banking Conference, 2-3 November 2000, Frankfurt am Main
1999-10-11 : The Eurosystem's monetary policy strategy: The first year's experience
1997-06-30 : Farewell to a Central banker