The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "involvement" appeared
2003-10-13 : Introductory statement with Q&A2002-04-24 : The role of the Eurosystem in prudential supervision
2001-05-31 : The role of financial markets for economic growth
2000-09-23 : The role of the ECB at the international level