The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "signed" appeared
2003-10-29 : Address delivered on the occasion of a special ECOFIN dinner to pay tribute to his leadership of the European Central Bank1999-11-19 : Introductory Statement at the Frankfurt European Banking Congress, Session I: Do markets need guidance?
1999-01-14 : The euro has arrived
1998-09-18 : Signing of the Headquarters agreement