The webapp provides for each item the link on ECB's website.
Speeches for : Willem F. Duisenberg where "academics" appeared
2002-10-24 : Second ECB Central Banking Conference 24-25 October 2002, Frankfurt am Main2002-07-05 : International Research Forum on Monetary Policy
2000-11-02 : First ECB Central Banking Conference, 2-3 November 2000, Frankfurt am Main
1999-12-03 : Monetary policy-making under uncertainty