The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "nel" appeared
2003-06-16 : The first lustrum of the ECB2002-11-12 : Opening remarks
2002-10-24 : Second ECB Central Banking Conference 24-25 October 2002, Frankfurt am Main
2001-06-04 : What exactly is the responsibility of central banks of large economic areas in the current slowdown of the world economy?
1998-01-30 : The role of the future European System of Central Banks