The webapp provides for each item the link on ECB's website.
Speeches for : Jurgen Stark where "sons" appeared
2011-10-12 : Economic adjustment in a monetary union2011-09-24 : The global financial crisis and the role of monetary policy
2010-11-19 : In search of a robust monetary policy framework
2008-09-05 : Monetary policy during the financial turmoil: what have we learned?