The webapp provides for each item the link on ECB's website.
Speeches for : Otmar Issing where "roll" appeared
2004-12-10 : Inflation persistence in the euro area2000-03-23 : Die Geldpolitik der Europäischen Zentralbank
Speeches for : Otmar Issing where "roll" appeared
2004-12-10 : Inflation persistence in the euro area