The webapp provides for each item the link on ECB's website.
Speeches for : Jurgen Stark where "economics" appeared
2011-09-24 : The global financial crisis and the role of monetary policy2011-04-12 : The global financial crisis and the role of central banking
2008-06-11 : Lessons for central bankers from the history of the Phillips Curve
2006-11-09 : The role of money: Money and monetary policy in the twenty-first century