The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "centralised" appeared
2003-06-10 : Structural reform and its implications for monetary policy2001-05-18 : The European Central Bank, the Eurosystem and the European System of Central Banks
1998-06-09 : ECB Press conference: Introductory statement
1998-01-30 : The role of the future European System of Central Banks
1997-10-22 : The European System of Central Banks: a profile
1997-09-22 : The European Monetary Institute and progress towards monetary union