The webapp provides for each item the link on ECB's website.
Speeches for : Otmar Issing where "concerns" appeared
2005-01-20 : Monetary Policy Implementation: Lessons from the past and challenges ahead. Opening speech at the ECB Workshop2004-05-12 : Summary of “The ECB and the euro - the first five years”
1999-12-03 : The monetary policy of the ECB in a world of uncertainty