The webapp provides for each item the link on ECB's website.
Speeches for : Eugenio Domingo Solans where "challenges" appeared
2003-11-13 : The changeover to the euro currency2003-02-13 : Financial innovation and monetary policy
2002-06-11 : Exchange rate policies in the accession process
2001-11-29 : Some remarks on the future of the euro
2000-08-26 : How should monetary policy makers respond to the new challenges of global economic integration?
1999-06-10 : First balance and further challenges for the euro