The webapp provides for each item the link on ECB's website.
Speeches for : Otmar Issing where "hayek" appeared
2005-11-06 : Mario Monti. A tribute.2003-10-12 : Rede aus Anlass der Verleihung des internationalen Preises der Friedrich-August-von-Hayek-Stiftung
2002-12-05 : Why stable prices and stable markets are important and how they fit together
2000-06-28 : New Technologies in Payments: A Challenge to Monetary Policy
1999-05-27 : Hayek - currency competition and European Monetary Union