The webapp provides for each item the link on ECB's website.
Speeches for : Sirkka Hamalainen where "range" appeared
1999-11-19 : The Eurosystem and the implementation of monetary policy1999-09-28 : The euro - nine months with Europe's new currency
1999-06-11 : The euro: pushing the boundaries
1998-10-26 : The European perspective on the euro