The webapp provides for each item the link on ECB's website.
Speeches for : Sirkka Hamalainen where "principles" appeared
2002-03-26 : Implementing monetary policy in the euro area2001-10-05 : The euro and the global economy
2000-09-18 : The euro and the dollar - new imperatives for policy co-ordination
2000-05-05 : Conference on the Operational Framework of the Eurosystem and the Financial Markets