The webapp provides for each item the link on ECB's website.
Speeches for : Otmar Issing where "answer" appeared
2006-01-18 : Communication and transparency - how do central banks meet these demands?2005-06-16 : European integration - achievements and challenges
2002-10-25 : Second ECB Central Banking Conference 24-25 October 2002, Frankfurt am Main
2000-10-26 : Should we have faith in central banks?