The webapp provides for each item the link on ECB's website.
Speeches for : Otmar Issing where "theory" appeared
2006-05-05 : The watchers conference: Theory and practice of monetary policy2006-03-16 : Dinner speech. Monetary policy: a journey from theory to practice - an ECB colloquium held in honour of Otmar Issing
2006-02-24 : Europe's Hard Fix: The Euro Area
2006-01-18 : Communication and transparency - how do central banks meet these demands?
2003-11-03 : Monetary policy in uncharted territory
2001-02-23 : Economic and Monetary Union in Europe: political priority versus economic integration?
1999-12-03 : The monetary policy of the ECB in a world of uncertainty
1999-06-17 : The ECB and its watchers