The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "opportunities" appeared
2002-10-08 : The integration of Europe's financial markets2000-11-14 : Recent developments and trends in world financial markets
1999-11-05 : The euro and a dynamic Europe
1999-04-27 : EMU: growth through stability
1998-01-22 : EMU - How to grasp the opportunities and avoid the risks