The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "desirable" appeared
2003-09-05 : Changing fortunes: financing world growth2002-10-08 : The integration of Europe's financial markets
2002-02-06 : The euro as a catalyst for European integration
1998-11-20 : The International Role of the Euro and the ESCBs Monetary Policy