The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "considerable" appeared
2002-11-12 : Opening remarks2002-09-24 : The first nine months of the euro cash era
2001-05-18 : The European Central Bank, the Eurosystem and the European System of Central Banks
1997-11-14 : Conditions for the success of EMU
1997-10-13 : Hearing of the President of the EMI by the Monetary Sub-Committee of the European Parliament