The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "transition" appeared
2003-04-03 : Introductory statement with Q&A2001-11-23 : The ECB and the accession process
2000-01-05 : Introductory statement with Q&A
1999-10-15 : EU enlargement, some views from the ECB
1999-01-18 : Hearing at the European Parliament's Sub-Committee on Monetary Affairs on 18 January 1999