The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "dates" appeared
2003-10-22 : Maastricht and the future of Europe2002-07-05 : International Research Forum on Monetary Policy
2000-05-12 : Official celebration of the 150th anniversary of the Nationale Bank van Belgiƫ/Banque Nationale de Belgique (National Bank of Belgium)