The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "participation" appeared
2000-09-08 : The international role of the euro1999-10-15 : EU enlargement, some views from the ECB
1998-09-22 : Statement to the European Parliament subcommittee on Monetary affairs
1997-10-17 : 1999 - A new European monetary system