The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "proceedings" appeared
2000-11-02 : First ECB Central Banking Conference, 2-3 November 2000, Frankfurt am MainSpeeches for : Willem F. Duisenberg where "proceedings" appeared
2000-11-02 : First ECB Central Banking Conference, 2-3 November 2000, Frankfurt am Main