The webapp provides for each item the link on ECB's website.
Speeches for : Otmar Issing where "operation" appeared
2006-03-16 : Dinner speech. Monetary policy: a journey from theory to practice - an ECB colloquium held in honour of Otmar Issing2005-01-20 : Monetary Policy Implementation: Lessons from the past and challenges ahead. Opening speech at the ECB Workshop
2001-10-17 : The challenge for monetary policy: a European perspective
1998-11-26 : The European Central Bank on the eve of EMU
1998-10-06 : Monetary policy in EMU