The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "compared" appeared
2001-06-26 : European Economic and Monetary Union: a success story2000-05-11 : Introductory statement with Q&A
1999-03-04 : Introductory statement with Q&A
1998-09-11 : ECB Press conference: Introductory statement