The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "variable" appeared
2001-04-11 : Introductory statement with Q&A2000-06-08 : Introductory statement with Q&A
1999-10-11 : The Eurosystem's monetary policy strategy: The first year's experience
1999-09-09 : Introductory statement with Q&A
1999-02-09 : The single European monetary policy
1999-02-09 : Die einheitliche europäische Geldpolitik