The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "participate" appeared
2000-11-02 : First ECB Central Banking Conference, 2-3 November 2000, Frankfurt am Main1998-02-16 : The ESCB: independent, transparent and communicative
1997-09-12 : From the EMI to the ESCB: Achievements and challenges