The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "broadly" appeared
2003-10-22 : Maastricht and the future of Europe2002-09-12 : Introductory statement with Q&A
2002-05-08 : What are the political consequences of the euro?
1998-09-11 : ECB Press conference: Introductory statement