The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "built" appeared
2003-10-29 : Address delivered on the occasion of a special ECOFIN dinner to pay tribute to his leadership of the European Central Bank2002-05-09 : International Charlemagne Prize of Aachen for 2002
1997-10-22 : The European System of Central Banks: a profile