The webapp provides for each item the link on ECB's website.
Speeches for : Jurgen Stark where "introduction" appeared
2011-10-17 : Hearing at the Committee on Economic and Monetary Affairs of the European Parliament2009-06-05 : Introduction for Session III “Economies of Central and Eastern Europe and the euro” during the National Bank of Poland Conference
2008-11-18 : Monetary, fiscal and financial stability in Europe
2008-01-16 : Knowns and unknowns about the creation of economic wealth in the euro area