The webapp provides for each item the link on ECB's website.
Speeches for : Otmar Issing where "task" appeared
2006-05-05 : The watchers conference: Theory and practice of monetary policy2004-06-10 : On the primacy of price stability
2000-10-26 : Should we have faith in central banks?
1999-04-15 : Rede zur Verleihung der Würde eines Ehrendoktors des Fachbereichs Wirtschaftswissenschaften der Johann Wolfgang Goethe-Universität, Frankfurt am Main, am 15. April 1999